ࡱ>  bbjbj W jjlTlnnnl,JL(ttt(s +L$ >'S1w"S1S1'8tt@2888S1tt8S1828Q@ +u, ~t> ;!5lnC3W]rHYDK35"8ll 2-04 17 March 2004 DRAFT ASSESSMENT REPORT APPLICATION A491 RESISTANT MALTODEXTRIN AS DIETARY FIBRE DEADLINE FOR PUBLIC SUBMISSIONS to FSANZ in relation to this matter: 28 April 2004 (See Invitation for Public Submissions for details) FOOD STANDARDS AUSTRALIA NEW ZEALAND (FSANZ) FSANZs role is to protect the health and safety of people in Australia and New Zealand through the maintenance of a safe food supply. FSANZ is a partnership between ten Governments: the Commonwealth; Australian States and Territories; and New Zealand. It is a statutory authority under Commonwealth law and is an independent, expert body. FSANZ is responsible for developing, varying and reviewing standards and for developing codes of conduct with industry for food available in Australia and New Zealand covering labelling, composition and contaminants. In Australia, FSANZ also develops food standards for food safety, maximum residue limits, primary production and processing and a range of other functions including the coordination of national food surveillance and recall systems, conducting research and assessing policies about imported food. The FSANZ Board approves new standards or variations to food standards in accordance with policy guidelines set by the Australia and New Zealand Food Regulation Ministerial Council (Ministerial Council) made up of Commonwealth, State and Territory and New Zealand Health Ministers as lead Ministers, with representation from other portfolios. Approved standards are then notified to the Ministerial Council. The Ministerial Council may then request that FSANZ review a proposed or existing standard. If the Ministerial Council does not request that FSANZ review the draft standard, or amends a draft standard, the standard is adopted by reference under the food laws of the Commonwealth, States, Territories and New Zealand. The Ministerial Council can, independently of a notification from FSANZ, request that FSANZ review a standard. The process for amending the Australia New Zealand Food Standards Code is prescribed in the Food Standards Australia New Zealand Act 1991 (FSANZ Act). The diagram below represents the different stages in the process including when periods of public consultation occur. This process varies for matters that are urgent or minor in significance or complexity.  INVITATION FOR PUBLIC SUBMISSIONS FSANZ has prepared a Draft Assessment Report of Application A491; and prepared a draft variation to the Australia New Zealand Food Standards Code (the Code). FSANZ invites public comment on this Draft Assessment Report based on regulation impact principles and the draft variation to the Code for the purpose of preparing an amendment to the Code for approval by the FSANZ Board. Written submissions are invited from interested individuals and organisations to assist FSANZ in preparing the Final Assessment for this Application. Submissions should, where possible, address the objectives of FSANZ as set out in section 10 of the FSANZ Act. Information providing details of potential costs and benefits of the proposed change to the Code from stakeholders is highly desirable. Claims made in submissions should be supported wherever possible by referencing or including relevant studies, research findings, trials, surveys etc. Technical information should be of sufficient detail to allow independent scientific assessment. The processes of FSANZ are open to public scrutiny, and any submissions received will ordinarily be placed on the public register of FSANZ and made available for inspection. If you wish any information contained in a submission to remain confidential to FSANZ, you should clearly identify the sensitive information and provide justification for treating it as confidential. Section 39 of the FSANZ Act requires FSANZ to treat in-confidence, trade secrets relating to food and any other information relating to food, the commercial value of which would be, or could reasonably be expected to be, destroyed or diminished by disclosure. Submissions must be made in writing and should clearly be marked with the word Submission and quote the correct project number and name. Submissions may be sent to one of the following addresses: Food Standards Australia New Zealand Food Standards Australia New Zealand PO Box 7186 PO Box 10559 Canberra BC ACT 2610 The Terrace WELLINGTON 6036 AUSTRALIA NEW ZEALAND Tel (02) 6271 2222 Tel (04) 473 9942  HYPERLINK "http://www.foodstandards.gov.au" www.foodstandards.gov.au www.foodstandards.govt.nz Submissions should be received by FSANZ by 28 April 2004. Submissions received after this date may not be considered, unless the Project Manager has given prior agreement for an extension. While FSANZ accepts submissions in hard copy to our offices, it is more convenient and quicker to receive submissions electronically through the FSANZ website using the Standards Development tab and then through Documents for Public Comment. Questions relating to making submissions or the application process can be directed to the Standards Management Officer at the above address or by emailing slo@foodstandards.gov.au. Assessment reports are available for viewing and downloading from the FSANZ website, or can be obtained from the Information Officer at either of the above addresses or by emailing  HYPERLINK "mailto:info@foodstandards.gov.au" info@foodstandards.gov.au. CONTENTS  TOC \o "1-2" \h \z  HYPERLINK \l "_Toc66173408" Executive Summary and Statement of Reasons  PAGEREF _Toc66173408 \h 6  HYPERLINK \l "_Toc66173409" Conclusion and Statement of Reasons  PAGEREF _Toc66173409 \h 8  HYPERLINK \l "_Toc66173410" 1. Introduction  PAGEREF _Toc66173410 \h 9  HYPERLINK \l "_Toc66173411" 2. Regulatory Problem  PAGEREF _Toc66173411 \h 9  HYPERLINK \l "_Toc66173412" 2.1 Current Standard  PAGEREF _Toc66173412 \h 9  HYPERLINK \l "_Toc66173413" 2.2 Requested Amendment to Standard 1.2.8  PAGEREF _Toc66173413 \h 9  HYPERLINK \l "_Toc66173414" 3. Objectives  PAGEREF _Toc66173414 \h 10  HYPERLINK \l "_Toc66173415" 4. Background  PAGEREF _Toc66173415 \h 11  HYPERLINK \l "_Toc66173416" 4.1 The History of Dietary Fibre Regulation in Australia and New Zealand  PAGEREF _Toc66173416 \h 11  HYPERLINK \l "_Toc66173417" 4.2 International Regulations on Dietary Fibre  PAGEREF _Toc66173417 \h 11  HYPERLINK \l "_Toc66173418" 5. Relevant Issues  PAGEREF _Toc66173418 \h 12  HYPERLINK \l "_Toc66173419" 5.1 Substances Categorised as Resistant Maltodextrins  PAGEREF _Toc66173419 \h 13  HYPERLINK \l "_Toc66173420" 5.2 Resistant Maltodextrins and the Definition of Dietary Fibre  PAGEREF _Toc66173420 \h 16  HYPERLINK \l "_Toc66173421" 5.3 Method of Analysis  PAGEREF _Toc66173421 \h 17  HYPERLINK \l "_Toc66173422" 5.4 Nutrition Issues  PAGEREF _Toc66173422 \h 17  HYPERLINK \l "_Toc66173423" 5.5 Safety Assessment  PAGEREF _Toc66173423 \h 17  HYPERLINK \l "_Toc66173424" 5.6 Dietary Exposure to Resistant Maltodextrins  PAGEREF _Toc66173424 \h 17  HYPERLINK \l "_Toc66173425" 5.7 Risk Assessment  PAGEREF _Toc66173425 \h 17  HYPERLINK \l "_Toc66173426" 6. Regulatory Options  PAGEREF _Toc66173426 \h 17  HYPERLINK \l "_Toc66173427" 7. Impact Analysis  PAGEREF _Toc66173427 \h 17  HYPERLINK \l "_Toc66173428" 7.1 Affected Parties  PAGEREF _Toc66173428 \h 17  HYPERLINK \l "_Toc66173429" 7.2 Impact Analysis  PAGEREF _Toc66173429 \h 17  HYPERLINK \l "_Toc66173430" 8. Consultation  PAGEREF _Toc66173430 \h 17  HYPERLINK \l "_Toc66173431" 8.1 Public Consultation  PAGEREF _Toc66173431 \h 17  HYPERLINK \l "_Toc66173432" 8.2 World Trade Organization (WTO)  PAGEREF _Toc66173432 \h 17  HYPERLINK \l "_Toc66173433" 9. Conclusion and Recommendation  PAGEREF _Toc66173433 \h 17  HYPERLINK \l "_Toc66173434" 10. Implementation  PAGEREF _Toc66173434 \h 17  HYPERLINK \l "_Toc66173436" Reference List  PAGEREF _Toc66173436 \h 17  HYPERLINK \l "_Toc66173437" Attachment 1 -  HYPERLINK \l "_Toc66173438" Draft Variation to the Australia New Zealand Food Standards Code  PAGEREF _Toc66173438 \h 17  HYPERLINK \l "_Toc66173439" Attachment 2 -  HYPERLINK \l "_Toc66173440" Food Technology Report  PAGEREF _Toc66173440 \h 17  HYPERLINK \l "_Toc66173441" Attachment 3 -  HYPERLINK \l "_Toc66173442" Assessment of Resistant Maltodextrins Against  HYPERLINK \l "_Toc66173443" the Definition of Dietary Fibre  PAGEREF _Toc66173443 \h 17  HYPERLINK \l "_Toc66173444" Attachment 4 -  HYPERLINK \l "_Toc66173445" SAFETY ASSESSMENT REPORT ON FIBERSOL-2 AND  HYPERLINK \l "_Toc66173446" FIBERSOL-2B (RESISTANT MALTODEXTRINS)  PAGEREF _Toc66173446 \h 17 Attachment 5 -  HYPERLINK \l "_Toc66173447" Dietary Exposure Assessment Report  PAGEREF _Toc66173447 \h 17  HYPERLINK \l "_Toc66173448" Attachment 6 -  HYPERLINK \l "_Toc66173449" Summary of Submissions  PAGEREF _Toc66173449 \h 17  Executive Summary and Statement of Reasons Food Standards Australia New Zealand (FSANZ) received an Application from Matsutani Chemical Industry Co Ltd on 17 January 2003 seeking to amend the Table to subclause 18(1) of Standard 1.2.8 Nutrition Information Requirements of the Australia New Zealand Food Standards Code (the Code) to include the method AOAC 2001.03 Total Dietary Fibre in Foods Containing Resistant Maltodextrin for the measurement of dietary fibre in foods containing resistant maltodextrins. If this amendment is approved, it will enable resistant maltodextrins (RMD) to be included in the calculation of total dietary fibre content for nutrition labelling purposes. The Applicant has stated that the current methods of analysis for dietary fibre prescribed in the Table to subclause 18(1) can accurately measure only up to 50% of any RMD that is present in a food. The method AOAC 2001.03 however, is reported to quantify close to 100% of the RMD that are in a food. In assessing the Applicants request, it is noted that the scope of Application A491 will not address whether RMD should be permitted for addition to foods. RMD are considered ingredients (i.e. maltodextrins) and are therefore already permitted for use in the manufacture of foods, subject to any public health and safety considerations. Objectives The specific objectives of Application A491 are to: enable consumers to make informed choices about the dietary fibre content of foods, by reviewing the list of approved methods for dietary fibre analyses to reflect available analytical techniques, and to reflect current scientific understanding on the status of RMD as dietary fibre; and protect public health and safety through an assessment of the safety, nutritional and technical issues associated with RMD. Issues Several issues have been identified as important in meeting the objectives of this Application, and in determining the preferred regulatory option for Application A491. The substances that are considered to be resistant maltodextrins RMD are a subcategory of the chemical group maltodextrins that have no single chemical structure, instead sharing a number of basic and distinct chemical features. Because of this chemical diversity, the number of different types of maltodextrins that could be captured by the new method is unknown. For the purposes of the technical assessments of Application A491, information on the Applicants own RMD products has been used. The definition of dietary fibre The Code defines dietary fibre in Standard 1.2.8 - Nutrition Information Requirements. In order to meet the definition four criteria must be met. RMD have been assessed as meeting all of these criteria, and in doing so, fulfil the requirements in the Code to be considered as forms of dietary fibre. Method of analysis The method of analysis, AOAC Official Method 2001.03 Total Dietary Fibre in Foods Containing Resistant Maltodextrin has been assessed by FSANZ as a suitable method for measuring the total dietary fibre content of foods containing RMD, should this Application be accepted. Nutrition issues The main nutritional issues identified for RMD are the impact on nutrient absorption and availability, the potential for claiming RMD as dietary fibre on food labels, and the impact on consumers understanding of dietary fibre. It has been concluded that any increase in the ability to recognise RMD as forms of dietary fibre will not have a negative impact on the availability of nutrients from the domestic food supply, and will only produce a moderate increase in foods making dietary fibre claims. In regard to consumer confusion with the term dietary fibre, this confusion has been recognised as an important cost from the implementation of Application A491, and has been included in the cost-benefit assessments of this report. Risk Assessment The safety assessment concludes that from available data, there are no public health and safety concerns up to the maximum exposures studied, namely 60g/day for three months. Therefore, on the basis of the dietary exposure assessment, it is concluded that there will be no adverse effects from either short or long-term exposures to RMD when they are added to foods as proposed. Regulatory Options and Impact Analysis There are two options for addressing this Application: 1. Maintain the status quo by not including a new method of analysis for dietary fibre in Standard 1.2.8. 2. Include specific regulation in Standard 1.2.8 for a method of analysis of dietary fibre in foods containing RMD, and implement any appropriate risk management strategies. For each regulatory option, an impact analysis has been undertaken to assess the potential costs and benefits to various stakeholder groups. Conclusion and Statement of Reasons Option 2 has been identified as the preferred regulatory approach for Application A491. The considerations made in reaching this conclusion are as follows: RMD have been identified as meeting the definition of dietary fibre; the method AOAC 2001.03 has been assessed by FSANZ as suitable for measuring the total dietary fibre of foods containing RMD; RMD do not pose any public health and safety concerns; the recognition of RMD as forms of dietary fibre will not impair the nutritional status of Australian and New Zealand populations; if RMD are classified as a form of dietary fibre there is the potential for some increase dietary fibre claims, and subsequently an increase in the availability of dietary fibre within the food supply. Such a change may have an impact on consumers understanding of dietary fibre, however, it is considered that RMD would generally satisfy consumer expectations of dietary fibre; and although the implementation of Option 2 will impose some costs for affected parties, there will be an overall net benefit from proceeding with this option. 1. Introduction Food Standards Australia New Zealand (FSANZ) received an Application from Matsutani Chemical Industry Co Ltd on 17 January 2003 seeking to amend the Table to subclause 18(1) of Standard 1.2.8 Nutrition Information Requirements of the Australia New Zealand Food Standards Code (the Code) to include the method AOAC 2001.03 Total Dietary Fibre in Foods Containing Resistant Maltodextrin for the measurement of dietary fibre. If this amendment is approved, it will enable resistant maltodextrins (RMD) to be included in the calculation of total dietary fibre content for nutrition labelling purposes. The Applicant has advised that RMD can be added to any type of food that is currently formulated with digestible maltodextrins, suggesting that the addition of RMD to these types of foods fulfils the normal technological function associated with all maltodextrins. 2. Regulatory Problem 2.1 Current Standard Standard 1.2.8 Nutrition Information Requirements defines dietary fibre and prescribes methods of analysis to determine both the total dietary fibre and specifically named fibre content of food, such as inulin. The methods of analysis for dietary fibre are prescribes in subclause 18(1) as follows: 18 Methods of analysis to determine total dietary fibre and specifically named fibre content of food (1) Subject to subclause (2), the methods set out in the Table to this subclause are the prescribed methods of analysis for the determination of total dietary fibre and any specifically named fibre content of food for the purposes of nutrition labelling in this standard. Table to subclause 18(1) Column 1Column 2Food ComponentMethod of analysisTotal dietary fibreSection 985.29 of the AOAC, 17th Edition (2000), or Section 991.43 of the AOAC, 17th Edition (2000).Inulin and fructo-oligosaccharideSection 997.08 of the AOAC, 17th Edition (2000).InulinSection 999.03 of the AOAC, 17th Edition (2000). 2.2 Requested Amendment to Standard 1.2.8 The Applicant has stated that the current methods of analysis for dietary fibre prescribed in the Table to subclause 18(1) of Standard 1.2.8 do not accurately measure the dietary fibre content of foods containing RMD. These methods can include some RMD within their measurements of dietary fibre, however they are not designed specifically for this purpose and thus will only measure up to 50% of the RMD that may be present in a food. Therefore, the Applicant has applied to amend the Table to subclause 18(1) of Standard 1.2.8 of the Code to include AOAC 2001.03 as a method of analysis, which is reported to measure close to 100% of the RMD present in a food. In assessing the Applicants request, it is noted that the scope of Application A491 will not address whether RMD should be permitted for addition to foods. RMD are considered ingredients (i.e. maltodextrins) and are therefore already permitted for use in the manufacture of foods, subject to any public health and safety considerations. The focus of Application A491 will therefore extend only to the recognition of RMD as forms of dietary fibre, their inclusion in calculations of a foods dietary fibre content, and the insertion of the AOAC 2001.03 method in Standard 1.2.8. However, given the nature of RMD and their potential impact on the gastrointestinal tract, this Application has also been used as an opportunity to review the safety and dietary impacts of RMD based on available data. 3. Objectives The purpose of this assessment is to determine whether it would be appropriate to amend the Code and permit the inclusion of AOAC 2001.03 in the Table to subclause 18(1) of Standard 1.2.8. Such an amendment to the Code will need to be assessed by FSANZ in a manner consistent with three primary objectives as stated in section 10 of the FSANZ Act. Section 10 of the FSANZ Act lists the primary objectives as: the protection of public health and safety; the provision of adequate information relating to food to enable consumers to make informed choices; and the prevention of misleading or deceptive conduct. FSANZ must also have regard to: the need for standards to be based on risk analysis using the best available scientific evidence; the promotion of consistency between domestic and international food standards; the desirability of an efficient and internationally competitive food industry; the promotion of fair trading in food; and any written policy guidelines formulated by the Ministerial Council. The specific objectives of Application A491 that reflect these statutory requirements are: to enable consumers to make informed choices about the dietary fibre content of foods. To achieve this, FSANZ will review the list of approved methods for dietary fibre analyses to reflect available analytical techniques, and to reflect current scientific understanding on the status of RMD as forms of dietary fibre; and the protection of public health and safety through an assessment of the safety, nutritional and technical issues associated with RMD. 4. Background 4.1 The History of Dietary Fibre Regulation in Australia and New Zealand Prior to 1995, both Australia and New Zealand recognised dietary fibre as carbohydrate substances that could be measured only by the Prosky method (AOAC 985.29 Official Method). In 1995, FSANZ received Application A277 Inulin and Fructo-oligosaccharides as Dietary Fibre, requesting amendments that would allow for the recognition of inulin and fructo-oligosaccharides (FOS) as forms of dietary fibre substances that could not be measured by the Prosky method. These amendments resulting from Application A277 were subsequently approved in the year 2000, with the addition of new AOAC methods to Standard 1.2.8. Because there was no existing definition of dietary fibre in the Code at that time, a general definition of dietary fibre was also developed and included in Standard 1.2.8. 4.2 International Regulations on Dietary Fibre The Applicant states that its own resistant maltodextrin products (Fibersol-2 and Fibersol-2B) are recognised as forms of dietary fibre according to AOAC Official Method 2001.03 in Japan, Korea, the United States (US), the United Kingdom, other European Union countries, Taiwan, and is pending approval in Canada and China. 4.2.1 Codex Alimentarius Codex defines dietary fibre as the edible plant or animal material, that is not hydrolysed by the endogenous enzymes of the human digestive tract as determined by an agreed upon method REF _Ref61940684 \r \h  \* MERGEFORMAT 1. The Codex definition does not specify any analytical methods for the determination of dietary fibre for nutrition labelling. The Codex definition is currently under review as part of an assessment of the Guidelines for the Use of Nutrition Claims: Draft Table of Conditions for Nutrient Contents (CX/NFSDU 02/3). This review is being conducted by the Codex Committee on Nutrition and Foods for Special Dietary Uses, which has not as yet agreed upon a suitable definition. A proposed definition and list of appropriate analytical methods was circulated the 25th session of this Committee (2003), however a consensus was not reached. Further discussions are scheduled for the 26th session in 2004. 4.2.2 United States In the United States, dietary fibre is not explicitly defined in legislation, although fiber can be calculated using an official AOAC method (including AOAC 2001.03). The United States (US) Food and Nutrition Board has developed a definition for total dietary fibre based on methods of analysis as part of the development of the US Dietary Reference Intakes series. The proposed US definition of dietary fibre is: Dietary Fibre consists of nondigestible carbohydrates and lignin that are intrinsic and intact in plants. Functional Fibre consists of isolated, nondigestible carbohydrates that have beneficial physiological effects in humans. Total Fibre is the sum of Dietary Fibre and Functional Fibre. This definition is not currently included in the US Code of Food Regulations, and it is not envisaged that the definition will impact on recommended level of dietary fibre intake for the US population. However, if the definition is included in the US Code of Food Regulations, it may delineate sources of dietary fibre and associated potential health benefits, and have an impact on nutrition labelling within the US. Maltodextrin has Generally-Recognised-As-Safe (GRAS) status in the US, and is permitted for use in food under the US Code of Federal Regulations REF _Ref61940727 \r \h  \* MERGEFORMAT 2 with no limitation other than current good manufacturing practice (GMP). No GRAS status has been specifically given to the overall category of RMD, however the Applicant has provided information demonstrating that US GRAS status has been specifically applied to its RMD product, Fibersol-2. As RMD can be measured by the AOAC 2001.03 method, they can be fully included in dietary fibre content declarations on the labels of US foods. This also allows RMD to contribute to labelling of dietary fibre claims in the US. 4.2.3 Japan Japan has regulations for Foods for Specified Health Use (FOSHU). FOSHU products can carry specific health claims including those relating to dietary fibre. According to the Applicant, FOSHU products containing RMD have been approved and marketed in Japan where RMD are ingredients in beverages, powdered beverages, cookies and sausages. In Japan, RMD are recognised as forms of dietary fibre under FOSHU regulations and are included in dietary fibre content declarations. 5. Relevant Issues Several issues have been identified that are pertinent to the assessment of RMD as forms of dietary fibre: the substances that are considered to be RMD; whether RMD meet the definition of dietary fibre; the regulatory appropriateness of the AOAC 2001.03 method of analysis; the technological functions associated with RMD; the nutritional issues for RMD including the impact on nutrient absorption and availability, the dietary fibre claims made on labels, and the impact on consumers understanding of dietary fibre; the safety of RMD; the dietary exposure to RMD; and the overall risk associated with the recognition of RMD as dietary fibre. The New Zealand Food Safety Authority (NZFSA) submitted comments on the Initial Assessment to the effect that it was not convinced RMD should be excluded from consideration under Standard 1.5.1 Novel Foods. It was determined at Initial Assessment that RMD have been present in imported foods on the Australian and/or New Zealand market for many years. As NZFSA or other submitters have not supplied any evidence to indicate otherwise, the novel status of RMD will not be reassessed at Draft Assessment. 5.1 Substances Categorised as Resistant Maltodextrins RMD have been categorised by the Applicant as starch hydrolysates that contain indigestible components. Categorisation has also been made by the US Institute of Medicine, where RMD are referred to as mixtures of oligosaccharides and polysaccharides manufactured by pyrolysis and subsequent enzymatic treatment of cornstarch REF _Ref61942063 \r \h  \* MERGEFORMAT 3. Under either categorisation, the term resistant maltodextrins can apply to a wide range of substances. 5.1.1 The Chemistry of Maltodextrins and Resistant Maltodextrins RMD are a subset of the general category of maltodextrins for which there is no single chemical structure. Maltodextrins do, however, share the following characteristics REF _Ref61942079 \r \h  \* MERGEFORMAT 4: they are glucose polymers consisting primarily of the glycosidic linkages found in starch [a(1-4) and a(1-6)]; contain additional glycosidic linkages not normally found in starch; and have a more highly branched structure than the amylose and amylopectin molecules found in starch. It is the overall tertiary chemical structure of a maltodextrin that influences its digestibility REF _Ref62966264 \r \h  \* MERGEFORMAT 5, REF _Ref62966265 \r \h  \* MERGEFORMAT 6. The structure of RMD is such that human digestive enzymes are incapable of breaking it down for further digestion. Because the chemistry of maltodextrins is poorly understood, there is limited knowledge of the chemical structures that are responsible for this resistance. A more detailed review of the chemistry of starch, maltodextrins and RMD has been undertaken at Draft Assessment and can be found in the Food Technology Report at Attachment 2. The Food Technology Report has concluded that starches from various sources and the maltodextrins produced from them (both digestible maltodextrins and RMD) are variable in structure and function. Furthermore, the Code does not specify the source or the chemical structure of substances such as maltodextrins as they are treated as foods. Therefore, a wide variety of different maltodextrins could be detected by the AOAC 2001.03 method as resistant and included in total dietary fibre content calculations. 5.1.2 Known Resistant Maltodextrins As examples of RMD, the Applicant has provided scientific information on their own commercial RMD products Fibersol-2 and Fibersol-2B, which are international trademarks. In Japan, Fibersol-2 is known by the trademark Pinefiber C, while Fibersol-2B is known by the trademark Pinefiber. Fibersol-2 is composed of the (1-4) and (1-6) glucosidic bonds normally found in starch, and also contains smaller amounts of a/b(1-2) and a/b(1-3) linkages and levoglucosan REF _Ref62966265 \r \h  \* MERGEFORMAT 6 (not naturally present in starch). This chemical arrangement results in highly branched structures that are partially hydrolysed by human digestive enzymes, but still remain indigestible. The information provided by the Applicant indicates that Fibersol-2 contains approximately 90% of indigestible components (there are some digestible by-products resulting from the manufacturing process which are not measured by AOAC 2001.03) REF _Ref62966265 \r \h  \* MERGEFORMAT 6. Approval of AOAC 2001.03 would therefore allow for the Applicants product to be recognised as dietary fibre in domestic markets and to be included in dietary fibre content calculations on food labels. There are other similar commercial RMD available. Commercial hydrogenated RMD have been marketed in Japan and some other Asian countries, under the names of Fibersol-2H and H-Fiber (MIXOL for the international market). Pinefiber Bi is also available in Japan and has smaller molecules than Fibersol-2 or Fibersol-2B. A French company produces two RMDs: Nutriose FB (very similar to Fibersol-2); and Lycasin (very similar to MIXOL). The Applicant has provided specifications for several commercial RMD products as listed in Table 1 below. The type of information provided by the Applicant differs between each product; for example, the tests mentioned in brackets are not consistently provided in all cases and different characteristics are reported for different products. Table 1: Specifications for RMD products manufactured by the Applicant CharacteristicsFibersol-2Fibersol-2BFibersol-2HMIXOLAppearanceWhite free-flowing fine powder (by sensory test)While free-flowing fine powderWhite powder (by sensory test)Clear, colourless, viscous liquidTaste/odourSlightly sweet/odourless (by sensory test)Slightly sweet, odourlessSlightly sweet/odourless (by sensory test)Slightly sweet/odourless SolutionClear (by sensory test)Soluble in water, clear solution; Extraneous matterFree from foreign materialMoisture5% maximum (by JAS method)5% maximum29-31% (Plastic film method)Reducing sugars0.5% maximum (by Bertrand method)0.5% maximum (by Bertrand Method) Sugar AlcoholsSorbitol, maltitol and maltotritol: 10% maximum (by HPLC method)Maltitol: 25-35% (Solid basis, HPLC analysis)Indigestible Components85-95% (by enzyme-HPLC method)50% minimum by AOAC 2001.0385-95% (by Enzyme-HPLC method)45-55% (Solid basis, Enzyme-HPLC method); 10-20% (AOAC-Prosky method)Loss of Drying5% maximum (by 70oC reduced-pressure drying)Dextrose equivalent8-12 (by WS method)pH (in 10% solution)4-6 (by pH metre)4-6 Ash (% maximum)0.20.20.20.2Arsenic (ppm maximum)1122Nickel (ppm maximum)11Heavy metals (ppm maximum)5555Microbio-logicalStandard plate count300 /g maximum300 /g maximum300 /g maximum300 /g maximumYeast and mould100 /g maximum100 /g maximum100 /g maximum SalmonellaNegative /25gNegative /25gColiforms Negative /gNegative /gNegative /gNegative /g 5.1.3 Impact of Unknown Resistant Maltodextrins With the different chemical arrangements that maltodextrins can assume to achieve an indigestible structure, a wide variety of maltodextrins could fall into the subcategory of RMD and be captured in the dietary fibre measurements of AOAC 2001.03. Because of the large number of maltodextrins that exist, it is not possible to determine the full scope of substances that will be affected by the Applicants proposed amendment to the Code. In undertaking technical and scientific assessments for Application A491, the range of RMD has been restricted to those substances for which data is readily available; primarily the Applicants own commercial RMD products (Fibersol-2 and Fibersol-2B). It is, however, unknown as to whether other unidentified RMD will have characteristics (in addition to their indigestibility) that would allow for their recognition as forms of dietary fibre in the Code. Submitters are invited to comment on the substances that can be considered resistant maltodextrins and the following questions: Can the scientific and technical assessments of known RMD be applied to other types of maltodextrins that may be measured by AOAC 2001.03? If not, should RMD be defined in the Code as applying only to the chemical forms specified by the Applicant; i.e. polysaccharides composed of (1-4), (1-6), a/b(1-2), and a/b(1-3) glucosidic bonds and levoglucosan? 5.2 Resistant Maltodextrins and the Definition of Dietary Fibre Consideration of RMD as dietary fibre is fundamental to the assessment of this Application, as it will determine whether AOAC 2001.03 can be included in Standard 1.2.8. The definition of dietary fibre is provided in Standard 1.2.8 as follows: dietary fibre means that fraction of the edible part of plants or their extracts, or synthetic analogues that - (a) are resistant to the digestion and absorption in the small intestine, usually with complete or partial fermentation in the large intestine; and (b) promote one or more of the following beneficial physiological effects (i) laxation; (ii) reduction in blood cholesterol; (iii) modulation of blood glucose; and includes polysaccharides, oligosaccharides (degree of polymerisation > 2) and lignins. 5.2.1 Submitter Comments Four of the seven submissions made to the Initial Assessment Report commented on how the definition of dietary fibre applies to RMD. A mixed response was received from these submitters, with the Australian Food and Grocery Council (AFGC) and Prof. Gordon supporting the position that RMD can be defined as dietary fibre. Broader comments were received from the ACA and DAA stating that insufficient evidence had been provided at Initial Assessment to support the classification of RMD as dietary fibre Both the AFGC and Prof Gordon provided specific supporting comments on separate parts of the definition. The AFGC stated that sufficient evidence had been presented in support of RMD promoting all three physiological effects. Prof. Gordon mentioned that there are various experiments supporting the promotion of some of the stated physiological effects RMD, and also indicated that even the majority of traditional sources of dietary fibre do not promote all of the effects. The ACA also made additional comments to the effect that RMD should not be included in the Code under the definition of a dietary fibre, as: such classification would be misleading to consumers, and RMD do not meet the first sentence of the definition for dietary fibre. It was mentioned that because RMD have a radically different structure to that of the original starch, they could not be considered as synthetic analogues of a plant fraction. 5.2.2 Evaluation In response to the ACAs comment regarding the misleading of consumers from classifying RMD as forms of dietary fibre: up to 50% of the RMD content of a food can be measured by the methods of analysis currently available in the Code, and are thus already classified as dietary fibre for nutrition information purposes. In Attachment 3 of this Report, the available scientific literature has been used to assess RMD against the requirements of the definition for dietary fibre. The following is an evaluation of each criterion of the definition of dietary fibre based on the findings of Attachment 3 and the comments made by submitters. That fraction of the edible part of plants or their extracts, or synthetic analogues The comments made by the ACA indicate that there may be various interpretations of this criterion. It is agreed that RMD do not represent a synthetic analogue of a plant component, as the word synthetic indicates that the substance is artificially constructed from base materials. However, it has been determined that RMD are extracts of plant material (starch) obtained by pyrolysis and enzyme treatments and thus meet this part of the definition for dietary fibre. Resistant to the digestion and absorption in the small intestine, usually with complete or partial fermentation in the large intestine The analyses of the scientific evidence provided by the Applicant indicate that RMD display these digestive characteristics. Without any submitters presenting comments or evidence to the contrary, and comments from the AFGC in support, RMD are assessed as being indigestible in the small intestine with partial fermentation in the large intestine, and therefore meet this part of the definition for dietary fibre. Promote one or more of the following beneficial physiological effects - (i) laxation; (ii) reduction in blood cholesterol; (iii) modulation of blood glucose The assessment provided at Attachment 3 indicates that there is sufficient evidence supporting the promotion of laxation, which is sufficient to meet the requirements of the definition for dietary fibre. Comments from the AFGC and Prof. Gordon also support this outcome, and they were the only submitters to specifically address this criterion of the dietary fibre definition. Includes polysaccharides, oligosaccharides (degree of polymerisation > 2) and lignins The AFGC mentioned that the United States (US) Institute of Medicine has categorised RMD as types of oligosaccharides and polysaccharides. These comments and findings of Attachment 3 both indicate that RMD have the necessary chemistry to meet this part of the definition for dietary fibre. 5.2.3 Conclusion RMD meet each of the separate requirements stated in the definition of dietary fibre provided in Standard 1.2.8 as follows: RMD are an extract of a plant material (starch) obtained by pyrolysis and enzyme treatments; scientific material has been presented by the Applicant demonstrating that RMD are not digested by the human small intestine when assessed in vivo, and are partially fermented in the large intestine; there is sufficient evidence supporting the promotion of laxation. The promotion of one of the three listed physiological effects is sufficient to meet the requirements of the definition for dietary fibre; and RMD contain polysaccharides and oligosaccharides, with 60% of these substances having a DP >10. Therefore RMD can be considered forms of dietary fibre for the purposes of regulation within the Code. 5.3 Method of Analysis The Applicant proposes that a new method of analysis should be included in the Table to subclause 18(1) to measure the total dietary fibre content of foods for the purposes of the nutrition information labelling of dietary fibre. The proposed new method is known as AOAC Official Method 2001.03 Total Dietary Fibre in Foods Containing Resistant Maltodextrin. 5.3.1 The AOAC 2001.03 Method of Analysis The AOAC 2001.03 method is an extension of, and includes AOAC 985.29 (also known as the Prosky Method). AOAC 985.29 measures total dietary fibre by adding digestive enzymes and a phosphate buffer to the test portion (fat extracted), causing any digestible carbohydrates to be broken down into constituent monosaccharides. The resulting solution is filtered and dissolved in ethanol to produce a residue the dry weight of this residue (corrected for ash and protein) is the total dietary fibre content of the food. Under the AOAC 985.29 method, any carbohydrate remaining in the ethanol filtrate is considered to be digestible. However, as demonstrated by Ohkuma et al REF _Ref61942666 \r \h  \* MERGEFORMAT 7 and commented on by Prosky himself REF _Ref62969970 \r \h  \* MERGEFORMAT 8, a number of the carbohydrates ending up in the ethanol filtrate may in fact be indigestible and could be defined as forms dietary fibre. The AOAC 985.29 method only measures carbohydrates with a DP>12, as carbohydrates with a DP<12 will dissolve into the ethanol solution. Some RMD have a DP <12 and thus are not measured as dietary fibre according to the AOAC 985.29 method, although up to 50% of the RMD in a food may comprise part of the filtered residue (having a DP>12), and are thus already included in determinations of total dietary fibre using currently available methods of analysis in the Code. To overcome the inaccurate quantification of RMD, the AOAC 2001.03 method measures food for total dietary fibre content according to the AOAC 985.29 method, and then assesses a desalted version of the ethanol filtrate. A liquid chromatography determination is conducted on the filtrate to obtain the quantity of low molecular weight RMD (DP<12) that could not be measured under AOAC 985.29. The amounts from the AOAC 985.29 procedure and the liquid chromatography are summed to obtain the total dietary fibre content of the food. 5.3.2 The AOAC Official Method Validation Process The Applicant has provided information on an AOAC collaborative studies conducted to validate the AOAC 2001.03 method REF _Ref62966265 \r \h  \* MERGEFORMAT 6, REF _Ref61942666 \r \h  \* MERGEFORMAT 7, which has been adopted as First Action by AOAC International. Methods that are approved as First Action and Final Action are listed in the Official Methods of Analysis of AOAC International publication, currently in its 17th edition and are approved by AOAC International for widespread use. The AOAC 2001.03 method was due to have Final Action status granted in 2004. However, AOAC International has deferred a decision on the Final Action status of AOAC 2001.03 (and a number of other dietary fibre related methods) until 2005 so that an expert panel can be convened to review the general approach to analysing dietary fibre. Final Action status is given after two years of First Action status as a means of reviewing the method in question, with the principal aim of assessing its practical implementation. As no problems have been reported with the practical application of AOAC 2001.03 since its approval as First Action, it is highly unlikely that Final Action status will be denied once AOAC International resumes its discussions on the method REF _Ref64942011 \r \h  \* MERGEFORMAT 9. 5.3.3 Submitter Comments The Applicant has requested that AOAC 2001.03 be listed as a method for calculating the total dietary fibre content of foods containing RMD, rather than the amount of RMD in a food only. Comments were received from the Australian Food and Grocery Council (AFGC) and Prof. D Gordon indicating that the use of AOAC 2001.03 in this way was an appropriate application of the method. The AFGC further commented that the use of AOAC 2001.03 as a method for analysing total dietary fibre, while appropriate, might also cause problems if it was placed as a simple alternative to the other two existing methods for total dietary fibre. In the current format, the two available methods for total dietary fibre are variations of each other. However, using AOAC 2001.03 for total dietary fibre analyses would introduce a third separate method, and may therefore create some reasonable doubt as to which of the three methods is more appropriate for calculating total dietary fibre contents. The AFGC and Prof. D Gordon also mentioned that AOAC 2001.03 would likely be more expensive and time consuming than other methods of analysis for total dietary fibre due to the additional procedures involved. However, the AFGC stated that manufacturers would be willing to use AOAC 2001.03 despite the costs, but only where products contained RMD and more accurate results could be obtained than through the use of other methods. Prof. Gordon, as the principal author of the AOAC collaborative study that assessed the analytical procedures for RMD, has also indicated that AOAC 2001.03 is an accurate, representative and reproducible method of dietary fibre analysis. 5.3.4 Evaluation It is acknowledged that there is potential for the amendments of this Application to cause regulatory ambiguity as mentioned by the AFGC. This problem has been addressed via the proposed drafting for this Application that includes an Editorial Note for further clarity (see Attachment 1). The Editorial Note details the capabilities of the different methods for determining total dietary fibre, and states that methods AOAC 985.29 and AOAC 991.43 should not be used for the purposes of determining dietary fibre when the inclusion of RMD in this determination is required. There are likely to be additional costs to manufacturers who use AOAC 2001.03, however the recognition of RMD as forms of dietary fibre will provide marketing benefits to offset these costs, and manufacturers will still have a choice as to which method they use for determining total dietary fibre content. 5.3.5 Conclusion AOAC 2001.03 is an accurate, representative and reproducible method for measuring the total dietary fibre content of foods containing RMD, and can be listed in Standard 1.2.8 for this purpose. 5.4 Nutrition Issues The nutritional issues that have been identified for Application A491 are: the impact that dietary fibres and related substances have on nutrient absorption and availability; the potential for claiming RMD as dietary fibre on food labels; and the potential impact upon consumers understanding of dietary fibre. 5.4.1 Nutrient Absorption and Availability Dietary fibre has been shown to alter the bioavailability of nutrients during digestion, especially with the minerals calcium, iron, and magnesium, where a reduced absorption has been observed. At Initial Assessment, two means by which a reduction in nutrient availability and absorption could occur were identified. The first was the tendency for soluble dietary fibres to form viscous solutions and gels that can delay stomach emptying and thus reduce the absorption of some nutrients including glucose REF _Ref64793358 \r \h  \* MERGEFORMAT 10 REF _Ref61942792 \r \h  \* MERGEFORMAT . The second was the impact that dietary fibres have on nutrient absorption and availability through the presence of phytates and oxalates. These substances influence the digestion through their property of binding to various minerals, which prevents digestive processes from accessing these nutrients REF _Ref61942814 \r \h  \* MERGEFORMAT  REF _Ref61942814 \r \h 11. The phytate and oxalate content of manufactured RMD is unknown, however as they are processed and refined substances it is expected that only minor amounts of phytates and oxalates are present, if any at all. 5.4.1.1 Submitter comments In response to the nutritional concerns raised above, two submitters have indicated that these issues are unlikely to be significant for RMD. The AFGC mentioned that recent research on dietary fibre REF _Ref61942839 \r \h  \* MERGEFORMAT  REF _Ref61942839 \r \h 12 has shown that some types of soluble fibre may not have the reported negative influence on nutrient absorption. Prof. D Gordon also stated that dietary fibre per se does not impair nutrient absorption, and that it is the accompanying phytates and oxalates that create these problems. Because RMD are often extracted away from these substances, they are unlikely to have the negative nutritional impacts identified with other forms of dietary fibre. Comments were also received from the Australian Consumers Association (ACA) implying that the Applicants evidence promoted RMD as more beneficial for health than soluble fibre, a view that their own research does not support. 5.4.1.2 Evaluation Although the comments by the ACA may be true, the primary purpose of assessing the nutritional aspects of RMD is to determine whether these substances have any negative consequences for population health, rather than whether they are nutritionally equivalent or more beneficial than other dietary fibres. As no contrary evidence has been supplied by submitters or identified by FSANZ at Draft Assessment, it can be determined that RMD do not have any negative impacts on nutrient absorption and availability that are greater than the impacts identified generally for other dietary fibres. 5.4.1.3 Conclusion It is concluded that in the context of population nutrition, any increase in the RMD consumption resulting from its recognition as a dietary fibre will not result in the inability to source adequate nutrition from the domestic food supply. 5.4.2 Dietary Fibre Claims Should this Application be approved, RMD could be fully taken into account when determining a foods eligibility to bear a dietary fibre content claim in accordance with the Australian Code of Practice on Nutrient Claims in Food Labels and in Advertisements (CoPoNC, 1995). In New Zealand, there are no regulations in food law that determine the eligibility of a food to carry a dietary fibre claim. Instead, claims are now assessed in accordance with the New Zealand Fair Trading Act, 1986. The Australian CoPoNC criteria for claims for a source of dietary fibre are: Fibre content not less than 1.5 g per serve permits a source claim; Fibre content not less than 3 g per serve permits a good source claim; and Fibre content not less than 6 g per serve permits an excellent source claim. Claims relating to fibre under CoPoNC criteria are discouraged on foods having a significant fat content. Where 30% or more of the food energy is derived from fats, there must be a statement on the label drawing attention to the fat content of the food in the nutrition information panel. FSANZ previously proposed mandatory eligibility criteria for dietary fibre claims under Proposal P234 Criteria and Conditions for Making Nutrition Content and Related Claims based on the CoPoNC criteria. An additional clause was placed into these criteria stating that nutrition claims must not be made in relation to the fibre content of a food unless a food derives less than 10% of its average energy content from saturated fatty acids and trans fatty acids. However, in December 2003 the Australia New Zealand Food Regulation Ministerial Council (ANZFRMC) released policy guidelines for nutrition, health and related claims. FSANZ is commencing implementation of the new policy within the Code via the food standards setting process, and it is intended that the eligibility criteria (and any other relevant regulatory aspects) for all nutrition content claims will be addressed via this process. 5.4.2.1 Submitter Comments Queensland Health and the Dietitians Association of Australia (DAA) were concerned that although RMD could be technically recognised as forms of dietary fibre, their use as added forms of dietary fibre would encourage a shift away from traditional sources of fibre in the diet (e.g. fruit, vegetables and cereals) to processed foods containing fibre. Both Queensland Health and DAA did not provide any evidence to demonstrate that such a shift would occur. 5.4.2.2 Evaluation If the AOAC 2001.03 method is included in the Table to subclause 18(1) of Standard 1.2.8, it is likely that the number of food products claiming to contain dietary fibre would increase in Australia and New Zealand, due to the ability to declare greater amounts of RMD as dietary fibre. However, it should also be recognised that some of the RMD in foods may already be contributing to the declaration of a dietary fibre claim, by virtue of the current methods for determining total dietary fibre (AOAC 985.29 and AOAC 991.43) that can measure up to 50% of a foods RMD content. Also, as shown in Table 2 below, the Applicants estimates of RMD use in the food supply indicate that a number of the foods would contain RMD under the minimum level specified in CoPoNC for dietary fibre claims (and thus previously proposed for regulations of claims). Where RMD are proposed for addition at or below 6%, a serving size of 25 g or more will be required to make a claim under CoPoNC arrangements; many of the products in the snack foods, biscuits, crackers, processed meats and confectionery categories are proposed to have RMD added <6% and are usually recommended in smaller serving sizes. Table 2: Proposed levels of use of RMD Food group Food name Proposed level of use (%)General Processed FoodsCanned fruit0-5Soup ready to eat0-5Soup mix0-32BeveragesFruit and vegetable drinks0-10Water based drinks0.10Tea and coffee dry mixes0-75Modified and flavoured milks0-10Soy beverages0-10Cultured Dairy ProductsCup yoghurts Sweetened0-5Yoghurt beverages0-2.5Sour cream and sour cream based dips0-5CerealsHot Cereal0-5Ready-to-eat (RTE), Flaked, Extruded0-5Frozen Dairy DessertsIce-creams, Sorbets, Frozen yoghurts, Novelties, Other frozen dairy0-5Frozen novelties water, soy and dairy based0-5Confectionary ProductsChocolate0-2.5Other confectionary0-6High Fibre Jelly Mix0-38Prepared Jelly Desserts8-9Low joule confectionary0-18Snack FoodsExtruded (hot and cold), baked and fried1-5Baked GoodsBread0-6Sweet yeast-leavened baked goods0-6Sweet biscuits0-12.5Crackers0-12.5Rice Crackers0-6Processed MeatsProcessed meat0-10Sausages0-5Special Purpose FoodsFormulated meal replacement drinks prepared0-10Formulated meal replacement mixes0-30Formulated meal replacement biscuits and bars 0-15Formulated supplementary drinks prepared0-10Formulated supplementary food mixes0-30Formulated supplementary food0-15Special Fibre SupplementsFibre drink3-40Fibre drink mix0-100High Intensity Sweetener Tabletop sweeteners (intense sweetener and maltodextrin only)99  5.4.2.3 Conclusion As some RMD content can already contribute to the declaration of a dietary fibre claim, and as the proposed use of RMD in many foods is low, it is expected that any increase in foods making dietary fibre claims will be moderate and restricted to certain food groups. Of those foods that may have RMD added at levels sufficient to make a dietary fibre claim in Australia, additional restrictions could apply either from FSANZs implementation of ministerial policy guidance, and/or from the CoPoNC requirements on fat content. In New Zealand, compliance with the Fair Trading Act, 1986 adds a layer of protection against inappropriate claims on trivial amounts of dietary fibre content. 5.4.3 Consumers Understanding of Dietary Fibre and Sources of Dietary Fibre There is currently some disagreement amongst domestic and international scientific communities as to the identity of substances that should be included within the category of dietary fibre. Over the last few decades, the concept of what constitutes dietary fibre has changed remarkably, and the messages that are sent to the general public can sometimes be contradictory or vague. In this environment there is potential for consumers to become confused or misled as to the most appropriate and adequate sources of dietary fibre in the diet. 5.4.3.1 Submitter Comments Several submitters to the Initial Assessment raised particular concerns over the potential for consumer confusion that could occur with the classification of RMD as forms of dietary fibre. The ACA and Queensland Health both mentioned that consumers understanding of dietary fibre will be reduced if it cannot be demonstrated that RMD have the same health benefits as other types of dietary fibre, or if added forms of dietary fibre appear in non-traditional food sources. In contrast to the concerns over the impact on consumers understanding of dietary fibre, comments by the AFGC and Prof. D Gordon have indicated that a change in consumers understanding of dietary fibre may not necessarily represent a negative outcome. It was stated that RMD and similar forms of dietary fibre have positive health benefits, and even if RMD appear in non-traditional sources of dietary fibre, population health will improve due to an increasing level of dietary fibre content across the food supply. 5.4.3.2 Evaluation In considering the comments made by submitters, it has been recognised that the scope of Application A491 is restricted only to an assessment of the AOAC 2001.03 method. Approval of any new method of analysis increases the ability of the food industry to make claim the dietary fibre content of foods regardless of the substances measured by the method. It is the existing regulatory framework of using methods of analysis to determining dietary fibre content that produces this outcome, rather than the recognition of individual substances as forms of dietary fibre. Approval or disapproval of Application A491 will not address the broader regulatory arrangement for determining dietary fibre contents for nutrition information purposes, which is the main driving force behind any shift in the addition of dietary fibre to non-traditional food sources. The direct impacts from recognising RMD as forms of dietary are, however, relevant; and include the potential influence on consumers understanding dietary fibre. If the food industry was to increase the number and types of foods containing RMD that bear dietary fibre claims as described in section 5.5.2, there is a possibility that consumers could become confused over an apparent conflict with previous nutrition education messages on sources of dietary fibre. However, the eligibility criteria governing the claiming of dietary fibre content exist for the very reason of controlling such an impact on nutrition education. Any limitations with these eligibility criteria will be the main cause of any consumer confusion. Resolving the limitations of the eligibility criteria is outside the scope of this Application, although the potential for consumer confusion represents an important cost that may be incurred from the implementation of the proposed amendment to the Code. 5.4.3.3 Conclusion There is some potential for consumer confusion as a result of the proposed amendments of Application A491. As this confusion represents a cost, it has been further assessed as part of the cost benefit analysis (see section 7). 5.5 Safety Assessment An assessment has been undertaken to determine the safety of RMD in food for human consumption. Specifically, the assessment investigated the potential for RMD to cause gastrointestinal symptoms, hypoglycaemia or any other adverse change in physical, biochemical or haematological parameters after ingestion at either a single meal or following continuous ingestion. Safety data was only made available for the forms of RMD referred to by the Applicant, Fibersol-2 and Fibersol-2B. As such, the safety assessment only directly addressed the safety of Fibersol-2 and Fibersol-2B and the assessment does not extend to addressing the safety of other forms of RMD. The safety assessment can be found at Attachment 4, while the following is a summary of the conclusions of the safety assessment. Fibersol-2 and Fibersol-2B are considered safe for human consumption at all levels studied in humans; up to 60 g ingested at a single meal and up to 60 g/day over the long-term (the longest period of consumption studied at a dose of 60 g/day was three months). This conclusion is based on the following: Acute toxicity studies in animals indicate that the LD50 (lethal dose the amount that kills 50% of test subjects) is more than 20 g/kg bw and 40 g/kg bw for Fibersol-2 and Fibersol-2B. Sub-chronic studies in rats showed no significant changes in blood biochemical measures, body weight, internal organ weight and no abnormalities in internal organs upon dissection when Fibersol-2 and Fibersol-2B are included in the diet at up to 20%. The single administration dose that produces diarrhoea in 50% of subjects was estimated to be greater than 100 g. Short-term, single-administration human studies show a reduction in postprandial blood glucose following a meal and no indication of hypoglycaemia or any adverse gastrointestinal symptoms at dose levels up to 10 g. Human toleration studies of up to four months on healthy subjects and in subjects with diabetes showed favourable changes in some blood and blood biochemical parameters such as reductions in total cholesterol, -lipoprotein, and triglycerides; and increases in HDL-cholesterol. No other changes that were outside of normal ranges or clinically significant were detected in blood biochemical parameters, haematological parameters or urinalysis. There were no changes in physical parameters and no adverse gastrointestinal symptoms at dose levels up to 60 g/day in diabetic subjects and 30 g/day in healthy subjects (healthy subjects were not subjected to a regimen of 60 g/day in any of the studies). No mutagenicity was observed for either Fibersol-2 or Fibersol-2B in S. typhimurium TA98, TA100, TA1535, TA1537 or E.coli WP2uvrA- in comparison with reference buffer. Neither Fibersol-2 nor Fibersol-2B inhibit mineral absorption in in-vitro or in-vivo studies and this is attributed to their low viscosity. 5.6 Dietary Exposure to Resistant Maltodextrins A dietary exposure assessment (Attachment 5) has been undertaken by FSANZ to determine the potential dietary impact resulting from the addition of RMD to a variety of foods in Australia and New Zealand. The results of this assessment showed that the estimated mean and 95th percentile dietary exposures for consumers of RMD for Australia (2+ years of age) are 59.2 g/day and 152.6 g/day respectively. Estimated mean and 95th percentile exposures for New Zealand consumers of RMD (15+ years of age) are 38.5 g/day and 129.9 g/day respectively. Both the Australian and New Zealand mean results are below the maximum long-term exposure of 60 g/day Fibersol-2/Fibersol-2B identified in the safety assessment, however the results for the 95th percentile exceed this level for both countries. All estimated short-term exposures from a bolus dose (i.e. intake of RMD from a single food) are less than 16 g for any population group and for any food. The safety assessment concluded that short-term exposure from a bolus dose of Fibersol-2/Fibersol-2B is safe up to 60 g, the maximum level tested in human subjects. The dietary exposure assessment also reports that the baseline levels of dietary fibre intake are 22.0 g/day and 20.3 g/day as a mean for Australia and New Zealand respectively, and 42.9 g/day and 48.4 g/day as 95th percentiles for Australia and New Zealand respectively. In the worse case scenario portrayed by the dietary exposure assessment, the Applicants estimated addition of RMD to foods would result in an approximate doubling of the mean fibre intakes of the domestic population. As the recommended dietary fibre intake is 35-50 g/day in Australia REF _Ref61942958 \r \h  \* MERGEFORMAT  REF _Ref61942958 \r \h 13 and 25-30 g/day in New Zealand REF _Ref61942967 \r \h  \* MERGEFORMAT  REF _Ref61942967 \r \h 14, the addition of RMD to the food supply as indicated by the Applicant would bring dietary fibre intakes more in line with requirements. It is therefore concluded that recognising RMD as forms of dietary fibre will most likely result in an increase in the dietary exposure to RMD and subsequently an increase in the intake of dietary fibre. 5.7 Risk Assessment The public health and safety risk to Australian and New Zealand populations have been assessed on the basis of the findings of the safety assessment (section 5.6) and the dietary exposure assessment (5.7). 5.7.1 Short-Term Exposure to Resistant Maltodextrins Short-term human toleration studies have been undertaken to evaluate the safety of Fibersol-2/Fibersol-2B, and are described in Attachment 2. Specifically, the short-term studies were designed to investigate the potential for adverse gastrointestinal symptoms or hypoglycaemia. Based on the safety assessment, Fibersol-2/Fibersol-2B is considered safe for human consumption up to the maximum level tested of 60 g per single meal. The dietary exposure assessment estimated the exposure from a bolus dose to be less than 60 g. On the basis of the dietary exposure assessment, it is not expected that there will be any adverse effects from short-term consumption of RMD when added to the proposed foods at the proposed levels. 5.7.2 Long-Term Exposure to Resistant Maltodextrins Human toleration studies of between three and four months duration were undertaken to investigate the potential for Fibersol-2/Fibersol-2B to cause any adverse change in physical, biochemical, haematological or urinalysis parameters. The maximum level tested was 60 g/day in subjects with diabetes and 30 g/day in non-diabetic subjects. These studies are described in Attachment 4. None of the studies showed any changes outside of the normal ranges determined to be clinically significant and, as such, Fibersol-2/Fibersol-2B was concluded to be safe at the maximum level studied i.e. 60 g/day for three months. The dietary exposure assessment estimated the mean intake of RMD for both Australia and New Zealand to be below 60 g/day of Fibersol-2/Fibersol-2B. However, the dietary exposure assessment estimated the intake of RMD at the 95th percentile for both the Australia and New Zealand populations to be approximately 152.6 g/day and 129.9 g/day respectively. Although the estimated 95th percentile intake exceeds the maximum level tested in human toleration studies (and hence considered safe for human consumption), there are a number of assumptions and limitations associated with both the safety assessment and dietary exposure assessment that need to be considered: The dietary exposure assessment is based on information, supplied by the Applicant, on the proposed level of use and food groups that could potentially contain RMD. However as the Applicant was unable to provide specific information in relation to the proposed use of RMD, a large range of general food groups that could potentially contain RMD was nominated. These categories could contain specific foods that will not contain RMD in practice and may therefore overestimate the exposure to RMD. Dietary modelling processes result in the following assumptions that can lead to an overestimate of exposure: where a permission is assigned to a food classification, all foods in that group contain RMD to the maximum level; consumers always select the products containing RMD; and values for food group consumption are not able to reflect future changes in consumption patterns. 24-hour survey data is only available for estimating dietary exposures over time. Due to its short collection period, this data tends to over-estimate the habitual food consumption amounts for high consumers. Both the animal and human studies that were available for consideration in the safety assessment did not test Fibersol-2/Fibersol-2B at levels greater than 60 g/day. Therefore, based on the available studies, it is not known whether adverse effects would occur at higher dose levels. Although the estimated 95th percentile intake exceeds the maximum level tested in human toleration studies, this is likely to be an overestimate of actual intake. Therefore, it is not anticipated that there will be any adverse effects from long-term consumption of RMD. 6. Regulatory Options Two options have been considered for progressing A491 at Draft Assessment: 1. Maintain the status quo by not including a new method of analysis for dietary fibre in Standard 1.2.8. To maintain the status quo by not including a new method of analysis would mean that RMD would not be recognised as dietary fibre for nutrition labelling purposes. It is possible that RMD will be present in foods as there are no current prohibitions on their addition to, or presence in foods, but the full quantity of RMD will not be included in dietary fibre calculations used for nutrition information purposes. Under this Option it is recognised that current methods of analysis for dietary fibre can include approximately 50% of the RMD within a food as part of dietary fibre calculations. 2. Include specific regulation for a method of analysis of dietary fibre in Standard 1.2.8 for foods containing RMD, and implement any appropriate risk management strategies. Under this option, the full RMD content of a food would be included in calculations of dietary fibre, by the recognition of AOAC Official Method 2001.03 Total Dietary Fibre in Foods Containing Resistant Maltodextrin as an acceptable method for determining the dietary fibre content in foods. Foods containing RMD would therefore be able to include 100% of these substances in dietary fibre content declarations (e.g. nutrition information panels). 7. Impact Analysis 7.1 Affected Parties The parties affected by this Application are: consumers; Australian and New Zealand importers and manufacturers of RMD and foods containing RMD who make up the industry; the governments of New Zealand, Australian States and Territories, and the Commonwealth of Australia; and public health officials/professionals responsible for the nutrition education of Australian and New Zealand populations. 7.2 Impact Analysis This analysis assesses the immediate and tangible impacts of current food standards under Option 1, and the potential for growth in the market for RMD and products containing RMD under Option 2. 7.2.1 Option 1 Status Quo 7.2.1.1 Consumers The impact on consumers from this option is minor. Consumers are unlikely to know that manufacturers cannot include all of the RMD in a food within dietary fibre content declarations. However, under this option, the lack of an industry incentive is likely to keep added amounts of dietary fibre within current boundaries, thus limiting the availability of foods to consumers that contain a higher dietary fibre content. Consumers may benefit from the minimal changes in nutrition education messages on dietary fibre that will occur under this option. 7.2.1.2 Food Industry There is a potential disadvantage to industry in not permitting the AOAC method, as RMD would represent potential claimable sources of dietary fibre in foods. Those manufacturers whose products currently contain RMD may incur a cost through a lost marketing potential, however as up to 50% of the RMD in a food can be captured by current methods, the extent of this potential loss would be minimal. Some sectors of the food industry may also incur a cost through the inability to add RMD as a source of dietary fibre, by virtue of the inability to reflect this addition in a products dietary fibre content declaration. 7.2.1.3 Government There are no identified impacts for government agencies and institutions from not including a new method of analysis for dietary fibre, as this option maintains the status quo. 7.2.1.4 Public Health Officials/Professionals As the main disseminators of nutrition education, public health officials/professionals may benefit from the minimal changes in nutrition education messages on dietary fibre that will occur under this option. 7.2.2 Include specific regulation for a method of analysis of foods containing RMD in Standard 1.2.8, and implement any appropriate risk management strategies subject to a safety assessment to be conducted at Draft Assessment. 7.2.2.1 Consumers There are potential benefits to consumers under this option, as they may have access to a wider choice of products containing dietary fibre and will have access to more accurate nutrition information on the total dietary fibre content of foods containing RMD. A new range of food products containing RMD may, however, create a level of consumer confusion on sources of dietary fibre. This is particularly true if foods that are traditionally poor sources of dietary fibre were to use added RMD as a means of increasing their dietary fibre content. If manufacturers incur costs from using RMD in products that have not traditionally contained added forms of dietary fibre, then there is also the potential for this option to create an additional cost to consumers through increased product prices. 7.2.2.2 Food Industry Industry may potentially benefit from broadening the types of substances considered as dietary fibre, and by allowing for the presence of all RMD to be included in dietary fibre content values. Through the ability to recognise a higher dietary fibre content on a products label, manufacturers would be able to increase the marketing potential of products by: including current levels of RMD in dietary fibre calculations, adding RMD to a product as a substitute for digestible forms of maltodextrin, or adding RMD as an innovative form of dietary fibre. A prescribed method of analysis that incorporates entire values of RMD will be a potential benefit for both industry and consumers by providing a level of consistency in the estimation and thus labelling of the dietary fibre content in foods. Industry could, however, incur some costs from Option 2, as AOAC 2001.03 is likely to be more costly due to the inclusion of an additional analytical step beyond those of other analytical techniques. However, these costs would only apply to those sections of the industry that choose to use AOAC 2001.03 in preference to other methods of calculating total dietary fibre content. These sections of the industry are also likely to be those who will receive the greatest benefits from Option 2. 7.2.2.3 Government Nutrition education messages may need to be modified to allow for the classification of RMD as forms of dietary fibre, creating a cost for government agencies and institutions. This may result in an increased complexity of messages and may add to consumer confusion with regard to nutrition messages. However, government public health strategies for increasing population dietary fibre intakes may indirectly benefit from this option, through a potential increase in the range of foods available on domestic markets that contain higher levels of dietary fibre, or are identified as sources of dietary fibre. 7.2.2.4 Public Health Officials/Professionals Nutrition education messages may need to be modified to allow for the classification of RMD as forms of dietary fibre, creating a cost for public health officials/professionals. The potential for consumer confusion also represents a potential cost, as nutrition education activities will need to be changed to accommodate the general publics additional education requirements. 8. Consultation 8.1 Public Consultation In July 2003, FSANZ released for public consultation an Initial Assessment Report for Application A491. In response, 7 submissions from various stakeholder groups were received: two submitters supported Option 1, three submitters supported Option 2, and two submitters indicated that they would await the findings of the Draft Assessment before committing to a preferred option. A summary of submitter comments can be found in Attachment 6. This Draft Assessment Report will be released for a second six-week consultation period. The views of submissions made to the Draft Assessment will be incorporated into the development of a Final Assessment. 8.2 World Trade Organization (WTO) As members of the World Trade Organization (WTO), Australia and New Zealand are obligated to notify WTO member nations where proposed mandatory regulations are inconsistent with any existing or imminent international standards and the proposed measure may have a significant effect on trade. At the time of writing, there are no relevant international (Codex) standards that relate to the definition of dietary fibre or its methods of analysis. Such standards are currently under consideration by the Codex Alimentarius Commission, and it is understood that the proposed amendment to the Code is consistent with the current state of these deliberations. The amendments proposed by this Application will require notification to WTO members as RMD can be used in a broad range of foods and are recognised as dietary fibre in a number of overseas markets. Notification will be made following the public release of this Draft Assessment Report to the agencies responsible in accordance with Australia and New Zealand obligations under the WTO Technical Barrier to Trade (TBT) and Sanitary and Phytosanitary Measure (SPS) Agreements. This will enable other WTO member countries to comment on proposed amendment prior to the Final Assessment. 9. Conclusion and Recommendation The assessments outlined within this report indicate that any recognition of RMD as a source of dietary fibre will not constitute a risk to public health and safety, and will not adversely affect the dietary patterns or nutrient intakes of Australian and New Zealand populations. RMD meet the definition of dietary fibre as outlined in Standard 1.2.8. Recognition of RMD as sources of dietary fibre will not be misrepresentative, nor will the general public be misled by the full inclusion of RMD values in total dietary fibre content declarations on a food label. The AOAC 2001.03 method identified by the Applicant is an accurate and appropriate method for analysing the RMD content of a food for this purpose. In reviewing the costs and benefits of the available regulatory options, Option 1 is likely to have a neutral impact for consumers and governments due to the maintenance of current practices. However, industry will most likely incur a net cost due to the loss of potential marketing and food innovation opportunities. If Option 2 is implemented, there will be consequences for consumers, governments and public health professionals. The most significant impact is associated with the identified concerns for consumer confusion and the potential for a shift from traditional sources to added sources of dietary fibre. These concerns are, however, associated with the capability for foods to make dietary fibre content claims; this issue will be addressed through the regulatory work on nutrition, health and related claims that will develop appropriate regulations for dietary fibre content claims. Therefore, with processes in place to manage this cost, consumers, governments and public health professionals will experience a net benefit from Option 2 through a wider choice of products containing dietary fibre, and more accurate nutrition information on the total dietary fibre content of foods containing RMD. Industry, with the potential for increased marketing and manufacturing opportunities, stands to benefit from Option 2. On the basis of the above considerations, Option 2 is the preferred regulatory approach for Application A491. AOAC Official Method 2001.03 Total Dietary Fibre in Foods Containing Resistant Maltodextrin is recommended as a method for analysing dietary fibre in the Table to subclause 18(1) of Standard 1.2.8 as detailed in Attachment 1. 10. Implementation Following the second consultation period for this Application, a Final Assessment Report will be prepared for consideration by the FSANZ Board. If Application A491 is approved by the FSANZ Board, notification will be made to the Australia and New Zealand Food Regulation Ministerial Council (Ministerial Council) and it is anticipated that the proposed draft variations to the Code will come into effect shortly thereafter upon gazettal, subject to any request from the Ministerial Council for a review. A transition period is not required for the implementation of the proposed draft variations, as manufacturers will have the choice as to whether or not they wish to use the AOAC 2001.03 method of analysis. Current stock will also be unaffected, as existing methods of analysis for dietary fibre will continue to remain applicable and unaltered. Attachments 1. Draft Variation to the Australia New Zealand Food Standards Code 2. Food Technology Report 3. Assessment of Resistant Maltodextrins Against the Definition of Dietary Fibre 4. Safety Assessment Report on Fibersol-2 and Fibersol-2B (Resistant Maltodextrins) 5. Dietary Exposure Assessment Report 6. Summary of Submissions Reference List Codex Alimentarius (1995); Guidelines on Nutrition Labelling; CAC/GL 2-1985. United States Code of Federal Regulations Title 21 Food and Drugs, Section 184.1444 Maltodextrin. Institute of Medicine (2001), Dietary Reference Intakes: Proposed Definition of Dietary Fibre, National Academies Press, Washington DC. Caballero B (ed), Trugo LC (ed), Finglas PM (ed) (2003); Encyclopaedia of Food Sciences and Nutrition; Academic Press, Sydney; p1773-1775. Cummings JH and Englyst HN (1995); Gastrointestinal effects of food carbohydrate; Am J Clin Nutr, 61(4): 938S. Ohkuma K & Wakabayashi S, (2001); Fibersol-2: A Soluble, Non-digestible, Starch-derived Dietary Fibre; in McCleary B.V & Prosky L (Eds) Advanced Dietary Fibre Technology; Blackwell Science, Oxford, pp. 509-23. Ohkuma K, Matsuda I, Yasuo K, Tsuji K (2000), New Method for Determining Total Dietary Fibre by Liquid Chromatography; J AOAC International, 83(4): 1013-1019. Prosky L (2000); What is total dietary fibre?; J AOAC International, 83(4): 985-987. Ladeji O (18/2/2004); Program Manager - Method Validation, AOAC International; personal communication. Matsuoka A, Saito M, Nagano S (1992); Continuous Administration Tests of Indigestible Dextrin; 1:Study on the effects of the improvement of fat metabolism in healthy volunteers; J Jpn Clin Nutr 80(2): 167-172. Torre M, Rodriguez AR, Saura-Calixo F (1991); Effects of dietary fiber and phytic acid on mineral availability; Crit Rev Food Sci Nutr, 30(1): 1-22. Coudray C, Demign C, Rayssiguier Y (2003); Effects of Dietary Fibers on Magnesium Absorption in Animals and Humans; J Nutrition, 133(1): 1-4. Smith A, Kellet E, Schmerliab Y (1998); The Australian Guide to Healthy Eating; Australian Department of Health and Aging, Canberra; p38. Ministry of Health (2002); Food and Nutrition Guidelines for Healthy Adults: A background paper (draft); New Zealand Ministry of Health, Wellington; p11. Attachment 1 Draft Variation to the Australia New Zealand Food Standards Code To commence on gazettal [1] Standard 1.2.8. of the Australia New Zealand Food Standards Code is varied by [1.1] inserting in the Table to subclause 18(1) Total dietary fibre (including resistant maltodextrin)Section 2001.03 of the AOAC, 17th Edition, 1st Revision (2002) [1.2] inserting in the Editorial Note after the second paragraph Total dietary fibre as determined by Section 985.29 of the AOAC, 17th Edition (2000) or by Section 991.43 of the AOAC, 17th Edition (2000) may include resistant maltodextrins. However, these methods cannot fully determine resistant maltodextrins as total dietary fibre, and should not be used for this purpose. Section 2001.03 of the AOAC, 17th Edition, 1st Revision (2002) is an accurate method for determining resistant maltodextrins as dietary fibre, and should be used to ascertain total dietary fibre content where full analysis of resistant maltodextrins is required. Attachment 2 Application A491 Resistant Maltodextrin as Dietary Fibre Food Technology Report Introduction The development of starches and maltodextrins that are resistant to digestion is a relatively new innovation in the food industry and there is little information available in the scientific literature on their structures and functions. This report provides a basic explanation of the chemistry of starch and the variability of starch derivatives such as maltodextrins (including resistant maltodextrins RMD). Starch Starch is the starting material for the production of dextrins and maltodextrins. Starch occurs in plants as granules, with complex structures that contain mostly polysaccharides with some fats and proteins. The size and shape of starch granules vary from plant to plant. Starch composition varies greatly with the source. Much of the literature on the chemistry of starch relates to the starch produced from the wet milling of maize (corn), by a process that yields a starch of high purity. Starches obtained from other source materials or from dry milling processes may be more variable in composition. For simplicity, starch molecules are usually considered to consist of two major polymers. Amylose exhibits a mainly linear structure, consisting of glucose linked by a(1,4) bonds, while amylopectin is considered as glucose chains more highly branched by a(1,6) linkages1. Starch from waxy maize consists almost entirely of amylopectin, while common yellow dent maize has 72%, potato starch about 79%, wheat approximately 72% and tapioca about 17%, with the remainder being amylose2. Along with some chemical differences, the amylose:amylopectin ratio impacts on the properties of the gelatinized forms of starch. Maltodextrins Maltodextrins are produced by partially hydrolysing starches with enzymes. The chemical structure of maltodextrins falls somewhere between the complex polysaccharide chains of starch and the simpler molecules of corn syrup solids or sugars3. Maltodextrins from sources other than corn differ not only in functional properties, but also with other characteristics, such as flavour. In addition, processing conditions affect the types of molecules that result. In acid hydrolysis, controlling pH, time and temperature influences the outcome. Because of the differences in properties of various starch sources, the dextrins and maltodextrins made from them can be expected to have different characteristics. The Food Chemicals Codex (FCC) defines dextrin as follows: Dextrin is partially hydrolyzed starch converted by heat alone, or by heating in the presence of suitable food-grade acids and buffers, from any of several grain- or root-based unmodified native starches (e.g., corn, waxy maize, high amylase, milo, waxy milo, potato, arrowroot, wheat, rice, tapioca, sago, etc.).4 The U.S. Food and Drug Administration (FDA) defines maltodextrin as; "nonsweet nutritive saccharide polymer that consists of D-glucose units linked primarily by a(1,4) bonds and that has a dextrose equivalent (DE) of less than 20. It is prepared as a white powder or concentrated solution by partial hydrolysis of corn starch or potato starch with safe and suitable acids and enzymes."5 The FCC definition of dextrin relates specifically to the use of the food additive (INS 1400), whereas the FDA definition of maltodextrin relates to a US regulation. As both dextrins and maltodextrins can be considered as food ingredients in Australia and New Zealand, a variety of products that meet commercial specifications are available on domestic markets. The food industry uses more maltodextrins than dextrins and often refers to corn-based products when referring to maltodextrins. In addition to corn-derived maltodextrins, some ingredient manufacturers also produce maltodextrins from other starchy sources, such as potato, rice and tapioca. Depending on the starting material, maltodextrins may contain compounds other than glucose polymers, such as proteins. Even those products with the same DE may contain a different distribution of molecules - more medium-range molecules, and fewer larger molecules, for example. The process, its conditions, and the type of starch used as the starting material affect the exact composition and structure of the resulting glucose chains. Dextrose Equivalence (DE) DE indicates the degree of polymerization (DP) of the starch or dextrin molecules - the number of monosaccharide units in the molecules. DE is derived from the formula DE = 100 DP. Glucose (dextrose) possesses a 100 DE; starch has an approximately zero DE. Maltodextrins are usually classified by DE, indicating the amount of hydrolysis performed on a starch molecule. Most commercial maltodextrins are a mixture of different carbohydrate polymers. The higher the DE, the higher the level of monosaccharides and short chain polymers. Because maltodextrins and other hydrolyzed starches consist of a mixture of polymer lengths, the DE is an average value (i.e. 5 DE does not mean 5% glucose content). Since a maltodextrin with a low DE contains a larger amount of longer straight- and branched-chain units, it tends to exhibit characteristics more in line with those of starch, such as viscosity. As the DE increases and the level of lower molecular weight products increases, the maltodextrin tends to act more like a corn syrup solid. This means that a number of characteristics of maltodextrins are related to the DE. As DE increases, so do the following characteristics: browning (due to the increased level of reducing sugars); hygroscopicity/humectant properties; plasticity; sweetness; solubility; osmolality. As DE decreases, the following characteristics increase: molecular weight; viscosity; cohesiveness; film-forming properties; prevention of large sugar-crystal formation. Most commercial maltodextrins are spray-dried and sold as powders, although some liquid maltodextrins are available. The spray-drying procedure and agglomeration influence the characteristics of a particular maltodextrin product. Functions of Maltodextrins Maltodextrins act as dispersing aids, flavour carriers, bulking agents, humectants, viscosifiers and other functional ingredients. They can work in a wide variety of applications - from dry mixes to fillings and sauces to beverages. The functional characteristics related to DE help determine the applications where maltodextrins are used. Because maltodextrins fall in the lower DE range, they supply little or no sweetness. They are fairly bland, although they sometimes provide a low level of flavour. They are relatively inert to heat, pH and other process conditions, such as shear. Resistance to Digestion Processed starch is usually considered to be a digestible polysaccharide, providing nutrition in the form of glucose that results from enzymatic and acid hydrolysis in human digestive processes. Starch and maltodextrins derived from starch can, however, be naturally resistant or they can be manufactured with increased resistance to human digestive processes. Most polysaccharides pass into the large intestine more or less intact, as human gastrointestinal enzymes do not usually hydrolyze them. Ingested polysaccharides such as cellulose and gums have a beneficial effect in providing bulk for peristaltic action and by binding bile acids to lower cholesterol levels. Starch granules are also protected structurally from enzymic attack. Most vegetables and cereals must be processed in some way to yield digestible starch. Milling grains to flour, cooking, proofing and fermentation are examples of processes that make starch more available for digestion. Processing under high temperature and pressure, such as during extrusion, can modify some starches to make them more resistant to digestion. Being a variety of maltodextrin, RMD exhibit all or nearly all of the technological properties listed above for digestible maltodextrins. Similar to digestible maltodextrins, the term RMD can encompass a variety of chemical substances that share certain characteristics, but with each having their own unique minor differences. Conclusion Starches from various sources and the maltodextrins produced from them (both digestible maltodextrins and RMD) are variable in structure and function. The Australia New Zealand Food Standards Code does not specify the source or the chemical structure of substances such as maltodextrin as they are treated as foods. Therefore, a wide variety of different maltodextrins could be detected by the AOAC 2001.03 method as resistant and included in total dietary fibre content calculations. References White A, Handler P, and Smith EL (1968); Principles of Biochemistry; 4th Ed; McGraw-Hill, Sydney. Kuntz LA (1997); Making the Most of Maltodextrins; Weeks Publishing Company,  HYPERLINK "http://www.foodproductdesign.com" www.foodproductdesign.com. Whistler RL and Daniel JR (1985); Carbohydrates, in Food Chemistry; 2nd Ed; Fennema OR (Ed); Marcel Dekker, Inc. (1981); Food Chemicals Codex; 3rd Ed; National Academy Press, Washington D.C. Code of Federal Regulations Title 21, Sec 184.1444. Attachment 3 Assessment of Resistant Maltodextrins Against the Definition of Dietary Fibre The aim of this Attachment is to determine whether RMD are capable of meeting the following definition of dietary fibre as provided in Standard 1.2.8 Nutrition Information Requirements: dietary fibre means that fraction of the edible part of plants or their extracts, or synthetic analogues that (a) are resistant to the digestion and absorption in the small intestine, usually with complete or partial fermentation in the large intestine; and (b) promote one or more of the following beneficial physiological effects (i) laxation; (ii) reduction in blood cholesterol; (iii) modulation of blood glucose; and includes polysaccharides, oligosaccharides (degree of polymerisation > 2) and lignins. Because up to 50% of the RMD in a food may appear in the residue of AOAC 985.29 (as they have a degree of polymerisation (DP) >12), they are already included in determinations of total dietary fibre. These RMD will continue to be included in determinations of dietary fibre content, even if it is concluded that RMD do not meet the definition of dietary fibre. Assessment against Criterion 1 of the definition: the requirement to be an edible fraction of plants, their extracts, or synthetic analogues RMD can be considered an extract of a plant. The word extract indicates that the substance must have been separated out from a particular source. Extract does not preclude the further modification of the plant substance in question, only that the final product has been derived from a plant source. This interpretation of Criterion 1 is consistent with a previous assessment made as part of Application A277 Inulin and Fructo-oligosaccharides (FOS) as Dietary Fibre. During Application A277, it was recognised that inulin and FOS could be obtained from plant sources and thus conformed to the extract part of the definition. Therefore, as RMD are an extract of a plant material (starch) obtained by pyrolysis and enzyme treatments, they conform to the requirements of Criterion 1. Assessment against Criterion 2 of the definition: indigestibility In support of the classification of RMD as forms of dietary fibre, the Applicant has cited an in vivo study indicating that RMD are indigestible in the human body REF _Ref61846711 \r \h  \* MERGEFORMAT 1. The results of this study can be found in Tables 1 and 2 below. These results show that with an increase in the proportion of RMD in three manufactured fibre products, the blood glucose and insulin concentrations of five human males did not significantly increase after ingestion when compared to the ingestion of either glucose or maltodextrin (P<0.01). The product containing the highest proportion of RMD Fibersol-2 at 90% only produced a very small rise in blood glucose and insulin concentrations over a 150-minute period. Table 1: Blood glucose levels following the oral loading of glucose and various maltodextrins Study by Ohkuma et al, 1990 REF _Ref61846711 \r \h 1 Time After Oral Loading (min)Substance provided as oral bolus doseGlucose (50g)Digestible Maltodextrin (20g)Product 1 (contains 58% RMD)Product 2 (contains 90% RMD)08282828230143134120836015013011883901181051008112010090828015080828280 Table 2: Blood insulin levels following the oral loading of glucose and various maltodextrins Study by Ohkuma et al, 1990 REF _Ref61846711 \r \h  \* MERGEFORMAT 1 Time After Oral Loading (min)Substance provided as oral bolus doseGlucose (50g)Digestible Maltodextrin (20g)Product 1 (contains 58% RMD)Product 2 (contains 90% RMD)04446303626268604215216903381441202088415010484 These studies were undertaken using the Fibresol-2 product. During the production of the Fibresol-2 product it is expected that there will be a component of digestible manufacturing by-product. There was no statistical or laboratory determination in this study as to whether the digestible carbohydrate fractions of the Fibresol-2 products were responsible for the reported increases in blood glucose and insulin concentrations above a fasting level. Despite such an omission, the level of change in results from this study strongly indicate that RMD, as analysed by AOAC 2001.03, contribute significantly to their indigestibility when assessed in vivo. There is also evidence from a study on rats by Tsuji and Gordon (1998) REF _Ref64259528 \r \h  \* MERGEFORMAT 2 that RMD are partially fermented to SCFA by bacteria upon reaching the large intestine. Tsuji and Gordon assessed the digestibility of Fibersol-2 in the short intestine and found that ~10% was digested (comparable with the fraction of digestible carbohydrate in Fibersol-2), while 38% of the ingested RMD appeared in faeces. From these results the authors inferred that the remaining RMD had been fermented in the large intestine, and further assessments of the rat caecum pH indicated that SCFA production had increased. Assessment against Criterion 3 of the definition: promotion of beneficial physiological effects The definition of dietary fibre in Standard 1.2.8 of the Code currently has no formal conditions that underpin the determination of laxation, a reduction in blood cholesterol, or modulation of blood glucose. The Applicant has provided a number of studies supporting the position that RMD can produce the physiological effects detailed in the definition of dietary fibre. An assessment of this literature is provided below for each of the physiological effects of laxation, a reduction in blood cholesterol, and a modulation of blood glucose. Quantitative Requirements Underpinning Criterion 3 A benchmark of more than 1g of faecal wet weight increase per gram of test fibre ingested in either a food matrix or supplementary form was established for laxation effects in Application A277, however this benchmark has not been further consolidated as a formal requirement. Comments to the Initial Assessment were received from Prof. Gordon indicating that it would be ideal to develop criteria for the physiological effects listed in the definition of dietary fibre. However, there are no other regulatory agencies (e.g. USFDA or Health Canada) that currently measure the beneficial effects of dietary fibre, nor have any benchmarks been established in the scientific literature. Prof. Gordon commented that an analytical method measuring the source of dietary fibre components, safety information, and a compilation of animal and human studies demonstrating the physiological effects, should be sufficient in the absence of accepted standards. On the basis of this information, it is recognised that the establishment of any baseline levels for criterion 3 will be arbitrary at best. Therefore, the scientific evidence on each of the physiological criteria will be assessed on merit; if there is a clear demonstration that an effect is promoted by RMD, the relevant criterion in the definition for dietary fibre can be considered fulfilled. An exception will be made for laxation as a means of maintaining consistency with past assessments; there must be a demonstration that RMD can at least produce the inulin/FOS level of laxation before the laxation requirement of criterion 3 is satisfied. Laxation The Applicant has supplied 12 studies REF _Ref64259387 \r \h  \* MERGEFORMAT 3- REF _Ref53815514 \r \h  \* MERGEFORMAT 14 as evidence that RMD consumption produces a laxative effect. FSANZ has been unable to find any other studies that investigate this subject. Only Satouchi et al REF _Ref64259387 \r \h  \* MERGEFORMAT 3 assessed changes in faecal weight, and thus is the only study suitable for directly assessing the previously defined requirement for a laxation effect of 1 gram of faecal wet weight increase per gram of test fibre ingested. The study by Satouchi et al is comprised of three separate experiments. The first examined the influence of various RMD amounts on stool appearance for the purposes of determining the safety of RMD. The third assessment was a randomised trial (blinding unknown) observing intakes of 10g RMD/day to 5g RMD/day using self-reporting of stool frequencies, volumes, stool conditions and feeling after defecation. Aside from the feeling after defecation, only the 10g/day group experienced any significant change in the assessed variables. Of importance for the determination of a laxation effect are the results from the second assessment of Satouchi et al, which was conducted as a crossover design to assess the influence of RMD intake on stool weights and frequencies. The results can be found in Table 3 below, and indicate a significant difference in the wet weight, dry weight and stool frequencies between the test diet containing 20 g/day RMD and the control diet, with the wet weight results reported as a mean increase of 1.18 g faecal wet weight/gram of RMD ingested/day (206.7 g increase in weight over the 5 test days). Table 3: Results from Experiment 2 of Satouchi et al, 1993 REF _Ref64259387 \r \h  \* MERGEFORMAT 3 Study DesignRMD AdministrationNo. SubjectsMean wet stool weight (g)Mean dry stool weight (g)Moisture (%)Stool frequency (motions/week)Double blind crossoverTest week8778.2+93.2*180.5+12.9*76.8+1.85.92+0.40*Control week8571.5+58.7137.9+5.676.2+1.74.76+0.36* Statistically significant to control week, p<0.05 The other 11 studies on laxation REF _Ref53815510 \r \h  \* MERGEFORMAT 4- REF _Ref53815514 \r \h 14 used almost identical methodologies to each other, and reported very similar outcomes. The study designs were all crossover human trials examining the influence of a daily food/drink containing RMD, compared to a placebo food/drink with either a digestible form of maltodextrin or without RMD. The collections of results were conducted through the self-reporting of subjects, via questionnaires that examined stool frequency, stool volume, stool solidity, stool colour, stool odour and the clearance of bowels. The majority of the 11 laxation studies REF _Ref57622324 \r \h  \* MERGEFORMAT 5- REF _Ref53816014 \r \h  \* MERGEFORMAT 9, REF _Ref53815649 \r \h  \* MERGEFORMAT 11- REF _Ref53815514 \r \h  \* MERGEFORMAT 14 reported a significant increase in the frequency of bowel motions following the consumption of RMD compared to the placebo. Stool volumes were also reported to increase significantly REF _Ref53816002 \r \h  \* MERGEFORMAT 6- REF _Ref53816014 \r \h  \* MERGEFORMAT 9, REF _Ref57622356 \r \h  \* MERGEFORMAT 12, REF _Ref53816019 \r \h  \* MERGEFORMAT 13 with RMD administration, however it is difficult to determine if such increases represent valid results, as all studies relied on the measurement of stool volumes in arbitrary units (e.g. eggs, ping-pong balls, or spheres). Only one study used a more object manner of assessing the volume of stools, where a visual guide was provided to subjects for reporting purposes. A few studies also identified significant changes in stool solidity as a result of RMD intake REF _Ref53815510 \r \h  \* MERGEFORMAT 4, REF _Ref57622356 \r \h  \* MERGEFORMAT 12, REF _Ref53815514 \r \h  \* MERGEFORMAT 14, however these results were based on subjective categorisation of stool solidity by subjects. None of the eleven studies reported any significant change in stool colour, stool odour and the clearance of bowels. Overall, the evidence presented in these additional 11 studies reinforces the argument that RMD has an influence on laxation. However, the limitations in study designs are such that none of the studies are suitable for quantifying the impact of RMD on laxation. Therefore, these studies have been considered in Application A491 only to qualify the results on stool weights by Satouchi et al. The actual results of these 11 studies have not been provided within this Attachment due to the inconsistent and arbitrary nature of the study designs. Evaluation From the 12 studies presented by the Applicant, it is determined that RMD has some laxative properties such as promoting an increase in stool weight, stool frequency, and stool volume. However, of greatest significance is the study by Satouchi et al, which shows that an increase in faecal wet weight above a level of 1 gram per gram of ingested RMD can be achieved. Therefore, RMD can be considered capable of producing a laxative effect significant enough to fulfil this part of criterion 3. Reduction in Blood Cholesterol Seven studies have been identified that examine the effects of RMD intake REF _Ref52161185 \r \h  \* MERGEFORMAT 15- REF _Ref58291954 \r \h  \* MERGEFORMAT 21 on blood lipid profiles. The only animal study identified as having assessed the influence of RMD on cholesterol levels in animals (rats) REF _Ref52161185 \r \h  \* MERGEFORMAT 15 is unsuitable for use in this report, as there was no indication within the study article as to whether blood samples were taken while the animal subjects were in a fasting state. Furthermore, it has been documented that the blood lipid profile of rats is more susceptible to dietary changes than humans REF _Ref58301101 \r \h  \* MERGEFORMAT 22. Therefore, only the results from human studies have been used to assess the impact of RMD consumption on blood cholesterol. A detailed analysis of the six human studies REF _Ref52161154 \r \h  \* MERGEFORMAT 16- REF _Ref58291954 \r \h  \* MERGEFORMAT 21 and their results can be found in Table 4 (see the Appendix to this Attachment). From the results of these studies, the following changes from baseline readings were reported for doses between 30-60 g RMD / day (30 g/day was the commonly used dose) over a period of 4-16 weeks: a mean decrease in blood cholesterol levels from initial readings of 0.21% /day, and a mean decrease in blood triglyceride levels from initial readings of 0.39% /day. Two of the six studies REF _Ref52161246 \r \h  \* MERGEFORMAT 17, REF _Ref52161283 \r \h  \* MERGEFORMAT 20 reported a significant increase in HDL-cholesterol levels. However, the remaining studies are inconsistent with these reported outcomes; three studies reported no significant change in HDL-cholesterol levels REF _Ref52161256 \r \h  \* MERGEFORMAT 18, REF _Ref52161271 \r \h  \* MERGEFORMAT 19, REF _Ref58291954 \r \h  \* MERGEFORMAT 21, and one reported a significant decrease in HDL-cholesterol levels REF _Ref52161154 \r \h  \* MERGEFORMAT 16. Evaluation Overall, available evidence indicates that there is a noticeable and quantifiable lowering of major cholesterol biomarkers at doses of RMD that can be realistically obtained within normal eating patterns. As no evidence has been identified to contraindicate these findings, and FSANZ has not established an appropriate benchmark level in previous regulatory work, the reported changes in blood lipids are noted. Modulation of Blood Glucose Levels Both acute and long-term studies have been identified, which examine the impact of RMD intake on blood glucose levels. Because each methodology produces a different set of results, the relevant studies have been assessed in two separate groups. The majority of blood glucose studies are commonly conducted as acute trials using a bolus dose of RMD, and assess the postprandial change in blood glucose levels over a two-hour period as area-under-the-curve (AUC) values. Several human and animal studies also observe the regular consumption of a certain RMD dose over a long-term period. These continuous administration studies do not involve AUC assessments, instead providing results as a difference between baseline and final readings. A detailed assessment of results from the studies cited below can be found in Tables 5 and 6 (see the Appendix to this Attachment). Eight acute RMD studies have been identified that observe changes in blood glucose biomarkers REF _Ref52161246 \r \h  \* MERGEFORMAT 17, REF _Ref52161256 \r \h  \* MERGEFORMAT 18, REF _Ref52163490 \r \h  \* MERGEFORMAT 23- REF _Ref52163518 \r \h  \* MERGEFORMAT 26. These studies assess RMD at bolus doses of 1.5 g/kg body weight in rats, and a 1.5-10.0 g total intake in humans. Similar results were obtained in both rat and human studies, with RMD consumption producing a significantly lower postprandial rise in AUC values when compared to controls. Three exceptions were noted though: Uno et al. 1999 REF _Ref52163518 \r \h  \* MERGEFORMAT 26 did not observe any significant lowering of postprandial blood glucose levels following the consumption of tofu containing RMD by humans; Wakabayashi et al. 1999 REF _Ref58384597 \r \h  \* MERGEFORMAT 27 did not observe a significant decrease with the consumption of noodles and sweet rolls containing RMD by humans; and Wakabayashi et al 1995 REF _Ref58384589 \r \h  \* MERGEFORMAT 28 did not observe a significant decrease when rats were fed glucose, fructose or lactose boluses combined with a RMD dose. Two studies reported a significant decrease in the AUC for subjects with high fasting blood glucose levels, while subjects with fasting blood glucose levels within normal parameters did not experience a similar drop in the AUC REF _Ref52161256 \r \h 18, REF _Ref52163508 \r \h 25. Assessment of serum insulin levels (as AUC values) in two acute studies revealed a similar pattern of changes to those observed with blood glucose levels REF _Ref58384597 \r \h  \* MERGEFORMAT 27, REF _Ref58384589 \r \h  \* MERGEFORMAT 28. Four studies have assessed the effects of long-term consumption of RMD on blood glucose levels REF _Ref52161154 \r \h  \* MERGEFORMAT 16, REF _Ref52161246 \r \h  \* MERGEFORMAT 17, REF _Ref52161256 \r \h 18, REF _Ref58291954 \r \h 21. Two studies reported a significant decrease in blood glucose levels from baseline values over 12-16 week periods, and at doses of 13.7-30g/day in humans and 0.05 g/g bw/day in rats. One study by Mizushima et al 2000 reported a significant decrease in fasting blood glucose levels over 12 weeks, however when the RMD treatment was removed, blood glucose levels continued to decrease for eight weeks. Three studies (on humans) REF _Ref52161246 \r \h  \* MERGEFORMAT 17, REF _Ref52161256 \r \h 18, REF _Ref58291954 \r \h 21 also measured glycosylated haemoglobin (HbA1c) levels, which can quantify fluctuations in blood glucose over a three-month period. A decrease in these values was not observed. Of all 10 blood glucose studies identified, only four assessed the consumption of RMD in food REF _Ref52161246 \r \h  \* MERGEFORMAT 17, REF _Ref52161256 \r \h  \* MERGEFORMAT 18, REF _Ref58291954 \r \h  \* MERGEFORMAT 21, REF _Ref58384597 \r \h  \* MERGEFORMAT 27, while the remainder (the majority of short-term studies) assessed the consumption in drinks/fluids. The study by Fujiwara and Matsuoka REF _Ref52161246 \r \h  \* MERGEFORMAT 17 was the only one identified that observed the impact of RMD on humans with diabetes. Evaluation The reviewed evidence provides a distinct pattern of results. In both rats and humans, the postprandial levels of blood glucose are noticeably moderated by 5-10 g bolus doses of RMD, although several conflicting results did occur in some studies. However, continuous administration studies on humans do not reflect such changes in fasting blood glucose levels, and notably, the measurements of HbA1c levels in these studies remain unchanged. It is therefore noted that RMD can produce postprandial changes in blood glucose levels, but do not modulate blood glucose levels over a prolonged period of time. Conclusion for Criterion 3 It is concluded that there is sufficient evidence supporting the promotion of laxation; the impact on blood cholesterol levels is also noted. However, as criterion 3 requires the demonstration of only one physiological effect, it is determined that RMD meet this component of the definition for dietary fibre. Criteria 4: The requirement to consist of polysaccharides, oligosaccharides (degree of polymerisation > 2) or lignins RMD comply with the final sentence in the definition of dietary fibre, as demonstrated in a validation study REF _Ref61943651 \r \h  \* MERGEFORMAT 29 on the AOAC 2001.03 method of analysis that identifies RMD as comprising of polysaccharides and oligosaccharides, with an average molecular weight of 2000 daltons (DP = 12-13) and 60% of these substances having a DP >10. Conclusion It has been demonstrated in the available scientific literature that RMD is capable of meeting all components of the definition of dietary fibre as follows: RMD are an extract of a plant material (starch) obtained by pyrolysis and enzyme treatments; scientific material has been presented by the Applicant demonstrating that RMD are not digested by the human small intestine when assessed in vivo, and are partially fermented in the large intestine; there is sufficient evidence supporting the promotion of laxation. The promotion of one of the three listed physiological effects is sufficient to meet the requirements of the definition for dietary fibre; and RMD contain polysaccharides and oligosaccharides, with 60% of these substances having a DP >10. Reference List Ohkuma K, Matsuda I, Katta Y, and Hanno Y (1990), Pyrolysis of Starch and Its Digestibility by Enzymes Characterisation of Indigestible Dextrin Denpun Kagaku 37: 107-114. Tsuji K and Gordon DT (1998); Energy Value of a Mixed Glycosidic Linked Dextrin Determined in Rats; J Agric Food Chem, 46: 2253-2259. Satouchi M, Wakabayshi S, Okhuma K, FujiwaraK, Matsuoka A (1993); Effects of Indigestible Dextrin on Bowel Movements; Jpn J Nutr, 51: 31-37. Inaki M, Fujii S, Iino H (1999); Effects of the administration of soft drink containing indigestible dextrin on defecation frequency and faecal characteristics of Japanese healthy female volunteers; J Nutr Sci, 2(1): 44-51. Osigo H, Ito Y, Hayashi K (1999); Effects of Cookies Containing Indigestible Dextrin on Defecation and Faecal Condition in Human Subjects; J Jpn Assoc Dietary Fiber Res, 3(2): 79-83. Sato M, Oishi Y, Ohiro T, Morimatsu F, Inage H, Watanabe I, Yamada R, Kimura S (2000a); Effect of cooked and cured loin-roll ham containing indigestible dextrin on faecal amount and defecation frequency; J Nutritional Food, 3(4): 47-54. Sato M, Oishi Y, Ohmori T, Morimatsu F, Inage H, Watanabe I, Yamada R, Kimura S (2000b); Effect of sausage containing indigestible dextrin on faecal amount and defecation frequency; J Nutritional Food, 3(4): 55-62. Shi S, Kato K, Kusuhara S (2000); The effect of rice crackers containing indigestible dextrin on female defecation; J Nutritional Food, 3(2): 37-44. Tagaki K, Ikeguchi M, Ariura Y, Fujinaga N, Ishibashi Y, Sugawa-Katayama Y (2001); The effect of AOJIRU drink powder containing indigestible dextrin on defecation frequency and faecal characteristics; J Nutritional Food, 4(4): 29-35. Tanaka K, Mizutani H, Yamada S, Iwata Y, Katada T, Nakata S (2000); Beneficial effect of an vegetable drink containing indigestible dextrin on defecation in women with constipation; J Nutritional Food, 3(4): 39-45. Umekawa T, Fujii K, Matsuoka T (1999); Effect of drinks supplemented with indigestible-dextrin on faecal amount; J Nutritional Food, 2(2): 52-57. Unno T, Nagata K, Yayabe F, Horiguchi T (2000); Effect of drinks supplemented with indigestible dextrin on defecation in human; J Nutritional Food, 3(4): 31-38. Unno T, Nagata K, Suzuki N, Yayabe F, Horiguchi T (2001); Effect of a vegetable drink supplemented with indigestible dextrin on defecation in females; J Nutritional Food, 4(4): 21-27. Yamamoto Y, Nishida T, Sone Y (2000); The effect of ingestion of beverage supplemented with indigestible dextrin on human defecation; J Nutritional Food, 3(2): 29-36. Kishimoto Y, Wakabayashi S, Takeda H (1995); Hypocholesterolemic Effect of Dietary Fiber: Relation to Intestinal Fermentation and Bile Acid Excretion; J Nutr Sci Vitaminol, 41: 151-161. Nomura M, Nakajima Y, Abe H (1992); Effects of Long-term Administration of Indigestible Dextrin as Soluble Dietary Fiber on Lipid and Glucose Metabolism; J Jpn Soc Nutr Food Sci, 45: 21-25. Fujiwara K and Matsuoka A (1993); Continuous Administration tests of Indigestible Dextrin II: Study on the effects of the improvement of fat metabolism in patients with non-insulin-dependant diabetes mellitus; J Jpn Clin Nutr, 83(3): 301-305. Kishimoto Y, Wakabayashi S, Yuba K (2000); Effects of instant miso-soup containing indigestible dextrin on moderating the rise of postprandial blood glucose levels, and safety of long term administration; J Nutritional Food, 3(2): 19-27. Ohkuma K and Wakabayashi S, Fibersol2: a Soluble, Non-digestible, Starch-derived Dietary Fibre in McCleary BV and Prosky L (2001); Advanced Dietary Fibre Technology; Blackwell Science, Oxford, United Kingdom; p509-523. Matsuoka A, Saito M, Nagano S (1992); Continuous Administration Tests of Indigestible Dextrin I: Study of the effects of the improvement of fat metabolism in healthy volunteers; J Jpn Clin Nutr 80(2): 167-172. Mizushima N, Chiba Y, Katsuyama S, Koboyashi C (2000); Effect of long-term ingestion of indigestible dextrin containing soft drinks on safety and blood glucose levels; J Nutritional Food 3(3): 75-82. Dietschy J and Wilson J (1970); Regulation of cholesterol metabolism; NEJM, 282: 1179-1183. Mizushima N, Chiba Y, Katsuyama S, Daigo Y, Kobayashi C (1999); Effect of indigestible dextrin containing soft drinks on blood glucose level in healthy human subjects; J Nutritional Food, 2(4): 17-23. Sinohara H, Tsuji H, Seto A (1999); Effects of indigestible dextrin-containing green tea on blood glucose level in healthy human subjects; J Nutritional Food, 2(1): 52-56. Tokunaga K and Matsuoka A (1999); Effects of a FOSHU (food for specified health use) containing indigestible dextrin as a functional component on glucose and fat metabolisms; J Japan Diab Soc, 42(1): 61-65. Uno K, Takagi K, Akaza M, Takagi N, Yoshio N, Maeda I (1999); Effect of indigestible dextrin containing tofu on blood glucose level in healthy human subjects; J Nutritional Food 2(4): 25-31. Wakabayashi S, Kishimoto Y, Nanbu S, Matsuoka A (1999); Effect of Indigestible Dextrin on Postprandial Rise in Blood Glucose Levels in Man; J Jpn Assoc Dietary Fiber Res, 3: 13-19. Wakabayashi S, Kishimoto Y, Matsuoka A (1995); Effects of indigestible dextrin on glucose intolerance in rats; J Endocrinology, 144: 533-538. Gordon DT and Okuma K (2002); Determination of Total Dietary Fibre in Selected Foods Containing Resistant Maltodextrin by Enzymatic-Gravimetric Method and Liquid Chromatography: Collaborative Study; J AOAC International, 85(2): 435-444. Appendix to Attachment 2 Results from Studies Cited in Attachment 2 Table 4: Human Studies on Resistant Maltodextrin and Blood Lipid Profiles StudyStudy Period (weeks)Number of SubjectsRMD Dose (g/day)Results CholesterolResults TriglycerideResults HDL-cholesterolBaseline level (mg/dL)Final level (mg/dL)Change (% of baseline /day)Baseline level (mg/dL)Final level (mg/dL)Change (% of baseline /day)Baseline level (mg/dL)Final level (mg/dL)Change (% of baseline /day)Nomura et al, 1992 REF _Ref52161154 \r \h  \* MERGEFORMAT 1612660265+10209+9-0.25243+34176+42-0.3349+240+3-0.22Fujiwara and Matsuoka, 1993 REF _Ref52161246 \r \h  \* MERGEFORMAT 1716530230+25216+20-0.05285+60159+40-0.3940+446+50.13Kishimoto et al, 2000 REF _Ref52161256 \r \h  \* MERGEFORMAT 18121012226+12215+12NS186+16145+18-0.2652+454+4NSOhkuma and Wakabayashi, 2001 REF _Ref52161271 \r \h  \* MERGEFORMAT 198Healthy = 1030226+10199+10-0.21242+64178+41-0.4747+449+4NS8Diabetic #1 =530230+25220+25-0.07285+60244+45-0.2640+442+5NS8Diabetic #2 = 560265+10205+10-0.41243+30148+11-0.749+249+3NSMatsuoka et al, 1992 REF _Ref52161283 \r \h  \* MERGEFORMAT 2041030213+10198+10-0.3196+33178+41-0.3345+348+40.25Mizushima et al, 2000 REF _Ref58291954 \r \h  \* MERGEFORMAT 21121030204+33205+22NS186+97152.4+83NS51.250NS NS = Not significant Table 5: Bolus Dose Studies on Resistant Maltodextrin and Blood Glucose Levels StudyNo. and type of subjectsRMD Bolus DoseArea Under the Curve (AUC) (mg min/dL)Serum Glucose (mg min/dL unless otherwise stated)Serum Insulin (mmol/120 min)Significant Difference (p<0.05)?Kishimoto et al, 2000 REF _Ref52161256 \r \h  \* MERGEFORMAT 18Humans n=27, crossover designAll subjectsControl meal0graph-Yes; between the two mealsMiso Soup4.5ggraph-Subjects peak BSL > 150mg/dL, n=12Control meal0graph-Yes; between the two mealsMiso Soup4.5ggraph-Subjects peak BSL < 150mg/dL, n=15Control meal0graph-NoMiso Soup4.5ggraph-Mizushima et al, 1999 REF _Ref52163490 \r \h  \* MERGEFORMAT 23Humans n=22, crossover designAll subjectsControl: soft drink + food034.2+31.6-Yes; between the two test drinksTest: RMD soft drink + food9.8g46.9+24.6-Subjects BSL > 140mg/dL at 30min, n=12Control: soft drink + food048.4+37.8-NoTest: RMD soft drink + food9.8g62.9+26.3-Subjects BSL < 140mg/dL at 30 min, n=10Control: soft drink + food022.3+20.2-NoTest: RMD soft drink + food9.8g33.5+12.6-Sinohara et al, 1999 REF _Ref52163499 \r \h  \* MERGEFORMAT 24Humans n=39, crossover designSubjects BSL > 155mg/dL at 30min, n=22Control: green tea plus food092.1+30.4-Yes; between the two test drinksTest: RMD green tea plus food5g81.3+27.9-Subjects BSL < 155mg/dL at 30 min, n=13Control: green tea plus food096.1+22.8-No Test: RMD green tea plus food5g88.3+33.6-Tokunaga and Matsuoka, 1999 REF _Ref52163508 \r \h  \* MERGEFORMAT 25Humans n=40, crossover designAll subjectsControl: green tea plus food0g105.4+6.5-Yes; between the two test drinks Test: RMD soft drink plus food1.5g74.2+4.8-Uno K et al, 1999 REF _Ref52163518 \r \h  \* MERGEFORMAT 26Humans n=30, crossover designAll subjectsControl: tofu0ggraph-NoTest: RMD containing tofu5ggraph-Subjects BSL > 155mg/dL at 30min, n=18Control: tofu0ggraph-NoTest: RMD containing tofu5ggraph-Subjects BSL < 155mg/dL at 30 min, n=22Control: tofu0ggraph-NoTest: RMD containing tofu5ggraph-Wakabayashi et al, 1999 REF _Ref58384597 \r \h  \* MERGEFORMAT 27Humans, crossover design10 healthy malesglucose50g graphgraphSerum glucose - no; Serum insulin yes, between the two sugar loadsglucose + RMD50g+ 10g RMDgraphgraph24 health males and femalessucrose100g graphgraphYes; between the two meals for both serum glucose and insulinsucrose + RMD100g+ 10g RMDgraphgraph24 subjects BSL < 145 mg/dL at 30 mindigestible maltodextrin50ggraphgraphSerum glucose - no; Serum insulin yes, between the two sugar loadsdigestible maltodextrin + RMD50g + 10graphgraphWakabayashi et al, 1995 REF _Ref58384589 \r \h  \* MERGEFORMAT 28Sprague-Dawley Rats, n=78 Glucose bolusWithout RMD, n=6013.6+0.7 mmol/120 min245+26NoWith RMD, n=61.5g/kg bw13.8+0.3 mmol/120 min241+23Fructose bolusWithout RMD, n=6011.9+0.2 mmol/120 min133+5NoWith RMD, n=61.5g/kg bw12.4+0.3 mmol/120 min151+11Sucrose bolusWithout RMD, n=10013.5+0.1 mmol/120 min248+22Serum Glucose Yes (p<0.01) Serum Insulin Yes (p<0.05)With RMD, n=101.5g/kg bw12.4+0.3 mmol/120 min180+16Maltose bolusWithout RMD, n=6014.8+0.7 mmol/120 min223+11Serum Glucose Yes (p<0.05) Serum Insulin Yes (p<0.05)With RMD, n=61.5g/kg bw12.8+0.6 mmol/120 min164+21Lactose bolusWithout RMD, n=5012.9+0.5 mmol/120 min177+35NoWith RMD, n=51.5g/kg bw12.3+0.2 mmol/120 min198+34Digestible maltodextrin bolusWithout RMD, n=6014.5+0.4 mmol/120 min304+17Serum Glucose Yes (p<0.05) Serum Insulin Yes (p<0.05)With RMD, n=61.5g/kg bw13.0+0.4 mmol/120 min229+21Rats fed for 2 weeks prior to bolus dose of glucose, n=26Control feed n=6013.0+0.6 mmol/120 min253+27Yes; each group is significantly different from the other for both glucose and insulin results (p<0.05)High sucrose feed n=12016.7+0.6 mmol/120 min620+37High sucrose + RMD feed (1.5g/kg body weight) n=8014.8+0.5 mmol/120 min417+56graph = results were only displayed in graph format (were measured though) - = variable was not assessed as part of the study Table 6: Continuous Administration Studies on Resistant Maltodextrin and Blood Glucose Levels StudyStudy PeriodNo. and type of SubjectsRMD DoseFasting Blood Glucose (mg/dL)HbA1c (%)Baseline level Final level Significant Difference (p<0.05)?Baseline level Final level Significant Difference (p<0.05)?Nomura et al, 1992 REF _Ref52161154 \r \h  \* MERGEFORMAT 162 weeksRats, n=13Control feed n=7 0147+5128+6Yes; between the two groups by the end of the study period---RMD feed n=60.05g/g body weight/day140+5106+10--Fujiwara and Matsuoka, 1993 REF _Ref52161246 \r \h  \* MERGEFORMAT 1716 weeksHuman, diabetics, n=530g/day213+34200+29No8.4+0.98.3+1.2NoKishimoto et al, 2000 REF _Ref52161256 \r \h  \* MERGEFORMAT 1812 weeksHuman, n=1013.7g/day103+5.7108.6+8.3No5.5+0.25.5+0.3NoMizushima et al, 2000 REF _Ref58291954 \r \h  \* MERGEFORMAT 2112 weeksHuman, n=10, fasting serum glucose 110-126 mg/dL30g/day113.7+13.5105.5+13.4*Yes, over the study period5.1+0.65.1+0.6*No- = variable was not assessed as part of the study * = It should be noted that further assessment of fasting blood glucose and HbA1c were performed 8 weeks after cessation of the RMD dose. Although HbA1c results remained statistically unchanged (5.2+0.7%), the fasting blood glucose results continued to maintain the decreasing trend (103.9+13.9 mg/dL) at previous rates despite the absence of RMD consumption. Attachment 4 SAFETY ASSESSMENT REPORT ON FIBERSOL-2 AND FIBERSOL-2B (RESISTANT MALTODEXTRINS) CONTENTS  TOC \h \z \t "Heading 5,1,Heading 7,2,Title,1"  HYPERLINK \l "_Toc62019133" 1. Introduction  PAGEREF _Toc62019133 \h 17  HYPERLINK \l "_Toc62019134" 1.1 Specifications for RMDs  PAGEREF _Toc62019134 \h 17  HYPERLINK \l "_Toc62019135" 1.2 Generally Recognised as Safe (GRAS) status in the US  PAGEREF _Toc62019135 \h 17  HYPERLINK \l "_Toc62019136" 2. Review of available studies  PAGEREF _Toc62019136 \h 17  HYPERLINK \l "_Toc62019137" 2.1 In-vitro studies  PAGEREF _Toc62019137 \h 17  HYPERLINK \l "_Toc62019138" 2.2 Animal studies  PAGEREF _Toc62019138 \h 17  HYPERLINK \l "_Toc62019139" 2.3 Human studies  PAGEREF _Toc62019139 \h 17  HYPERLINK \l "_Toc62019140" 2.4 Mutagenicity studies  PAGEREF _Toc62019140 \h 17  HYPERLINK \l "_Toc62019141" 2.5 Studies on mineral absorption  PAGEREF _Toc62019141 \h 17  HYPERLINK \l "_Toc62019142" 3. Overall conclusion  PAGEREF _Toc62019142 \h 17  HYPERLINK \l "_Toc62019143" References  PAGEREF _Toc62019143 \h 17  1. Introduction The purpose of this assessment is to determine the safety of resistant maltodextrins (RMD) in food for human consumption. RMD is a term used to describe starch hydrolysates (such as dextrin and maltodextrin) that contain indigestible components. The RMDs referred to by the Applicant is Fibersol-2 and Fibersol-2B, which are international trademarks. Fibersol-2 is known in Japan by the trademark Pinefiber C, while Fibersol-2B is known in Japan by the trademark Pinefiber. There are other similar RMD products available on the market. Hydrogenated RMD has been marketed in Japan and some other Asian countries, under the names of Fibersol-2H and H-Fiber (MIXOL for the international market). Pinefiber Bi is also available in Japan only and has smaller molecules than Fibersol-2 or Fibersol-2B. A French company produces two RMDs: Nutriose FB (very similar to Fibersol-2); and Lycasin (very similar to MIXOL). FSANZ has safety data for only Fibersol-2 and Fibersol-2B available for this assessment. It is likely that other RMDs have similar safety profiles because of the very similar structures and physiological properties. However, this safety assessment will only directly address Fibersol-2 and Fibersol-2B and the conclusions will not extend to addressing the safety of any other RMDs. Throughout the assessment, the names Fibersol-2 and Fibersol-2B will be used since these are the international trademarks. 1.1 Specifications for RMDs The following specifications for the respective RMDs were provided by the applicant. The type of information provided by the applicant differs between the RMDs, for example, the test method is not provided in all cases and different characteristics are reported for different RMDs. Table 1: Specifications for RMD products manufactured by the Applicant CharacteristicsFibersol-2Fibersol-2BFibersol-2HMIXOLAppearanceWhite free-flowing fine powder (by sensory test)While free-flowing fine powderWhite powder (by sensory test)Clear, colourless, viscous liquidTaste/odourSlightly sweet/odourless (by sensory test)Slightly sweet, odourlessSlightly sweet/odourless (by sensory test)Slightly sweet/odourless SolutionClear (by sensory test)Soluble in water, clear solution; Extraneous matterFree from foreign materialMoisture5% maximum (by JAS method)5% maximum29-31% (Plastic film method)Reducing sugars0.5% maximum (by Bertrand method)0.5% maximum (by Bertrand Method) Sugar AlcoholsSorbitol, maltitol and maltotritol: 10% maximum (by HPLC method)Maltitol: 25-35% (Solid basis, HPLC analysis)Indigestible Components85-95% (by enzyme-HPLC method)50% minimum by AOAC 2001.0385-95% (by Enzyme-HPLC method)45-55% (Solid basis, Enzyme-HPLC method); 10-20% (AOAC-Prosky method)Loss of Drying5% maximum (by 70oC reduced-pressure drying)Dextrose equivalent8-12 (by WS method)pH (in 10% solution)4-6 (by pH metre)4-6 Ash (% maximum)0.20.20.20.2Arsenic (ppm maximum)1122Nickel (ppm maximum)11Heavy metals (ppm maximum)5555Microbio-logicalStandard plate count300 /g maximum300 /g maximum300 /g maximum300 /g maximumYeast and mould100 /g maximum100 /g maximum100 /g maximum SalmonellaNegative /25gNegative /25gColiforms Negative /gNegative /gNegative /gNegative /g 1.2 Generally Recognised as Safe (GRAS) status in the US Fibersol-2 meets the requirements for US GRAS status as set out in 21 CFR 184.1444 Maltodextrin. This regulation requires that (1) the product be prepared from cornstarch with safe and suitable acids and enzymes and has a dextrose equivalent of less than 20 and (2) be of a purity suitable for its intended use. As such, there is no limitation on the amount of daily intake. 2. Review of available studies 2.1 In-vitro studies 2.1.1 In-vitro digestion study (Wakabayashi et al., 1991) Purpose A digestion test was performed in order to examine the resistance of Fibersol-2 and Fibersol-2B against successive digestion by salivary amylase, artificial gastric juice, pancreatic amylase and intestinal mucosal enzymes. Study conduct The salivary amylase used was Type IX-A of human origin, obtained from Sigma Co., artificial gastric juice was hydrochloric acid/potassium chloride solution at pH 2.0, pancreatic amylase was of porcine origin obtained from Behringer-Manheim Yamanouchi Pharmaceutical Co. Ltd., and intestinal mucosal enzymes were of rat origin obtained from Sigma Co. The resistance to successive digestions was examined by using the method described by Okada et al. (1990) and compared with maltodextrin (PDx#2, dextrose equivalent 10, Matsutani Chemical Industry Co., Ltd) that is an enzymatic hydrolysate of corn starch. Results Fibersol-2 and Fibersol-2B were partially hydrolyzed by salivary amylase, pancreatic amylase and intestinal mucosal enzymes and showed an increase in their reducing capacity but this increase was only marginal compared with maltodextrin. Fibersol-2 and Fibersol-2B were not digested by artificial gastric juice. Percentages of indigestible residue calculated by subtracting the increment of reducing sugar produced by successive digestion were 25.2% for maltodextrin, 61.4% for Fibersol-2B and 89.5% for Fibersol-2. Results are shown in Table 1. Conclusions The results indicate that the behaviour of Fibersol-2 and Fibersol-2B in the digestive trace is somewhat different from those of other soluble fibres such as pectin and guar gum. This is attributed to the solubility in water and low viscosity of Fibersol-2 and Fibersol-2B. It is estimated that approximately 90% of Fibersol-2 and approximately 60% of Fibersol-2B reaches the large intestine. Half of the resistant maltodextrin that reaches the large intestine is metabolised by intestinal bacteria, while the remainder is excreted in the faeces (Ohkuma and Wakabayashi, 2001). Table 1: Successive digestion of Fibersol-2B, Fibersol-2 and maltodextrin in-vitro Test mediumReducing sugar increasedaFibersol-2BFibersol-2MaltodextrinSalivary -amylase2.61.014.3Artificial gastric juice0.50.30.6Pancreatic -amylase5.41.810.7Intestinal mucosab38.610.574.8Indigestible residue (%)c61.489.525.2a=increment of reducing sugar measured by Somogyi-Nelson method; b=rate of glucose formation measured by glucose oxidase method; c=percentage of indigestible residue calculated by the data from in-vitro successive digestion test. 2.2 Animal studies 2.2.1 Absorption, metabolism and excretion studies Bile excretion and short-chain fatty acid production following ingestion of Fibersol-2 and Fibersol-2B has been measured in three studies reported in two separate publications. Bile excretion and short-chain fatty acid production following Fibersol-2 and Fibersol-2B ingestion (Wakabayashi et al., 1991) Test material: Fibersol-2 Test species: Rats, male Sprague-Dawley (Jcl:SD, CLEA Japan Inc.), 5 weeks old Dose: 10% Fibersol-2: 90% tap water solution Guidelines: Not stated Study conduct 5-week old rats were fed pellet food for 1 week and then distributed into 2 groups (6 rats per group, mean body weight of approximately 220g). After grouping, rats of group 1 received tap water (control) and rats of group 2 received 10% Fibersol-2 solution for 9 weeks, following which group 1 received Fibersol-2 solution and group 2 received tap water (control) for 2 weeks. All rats were allowed free access to food pellets and drinking water. Stools were collected daily for 1 week before the end of the experiment period and the dry weight was measured. The stools were freeze-dried, pulverized and bile acid was measured by the 3--hydroxysteroid dehydrogenase method (Wako Pure Chemical Ind. Ltd.) after extraction with chloroform and methanol. Deionised water (15 ml) was added to 1g of caecal content taken at the end of the experiment and the pH measured. For determination of short chain fatty acids, caecal content was added to isocupric acid and short chain fatty acids were extracted with chloroform-methanol mixture for analysis by gas chromatography. Acetic acid, propionic acid, butyric acid, isobutyric acid and valerianic acid were used as standards. Results There were no differences in body weight, feed efficiency and water consumption between the test (10% Fibersol-2 diet) and control groups. There was a non-significant increase in the caecum weight including caecal contents for the test group compared to the control group, but there were no other difference in weights of other organs or fatty tissues. Total short chain fatty acid excretion in the caecal content was significantly higher in the test group, especially for propionic acid, 5.860.9 mg/caecum/rat in the test group, compared with 2.460.46 mg/caecum/rat in the control group. Bile excretion and short-chain fatty acid production following Fibersol-2 and Fibersol-2B ingestion (Wakabayashi et al., 1991) Test material: Fibersol-2B and Fibersol-2 Test species: Rats, male Sprague-Dawley (Jcl:SD, CLEA Japan Inc.), 5 weeks old Dose: 20% Fibersol-2B; 5, 10 and 20% Fibersol-2 Guidelines: Not stated Study conduct Five-week old SD male rats (CE-s, Nippon Crea) were divided into 5 groups (8 rats per group) after pre-feeding with stock feed for 1 week. For the test period, Group 1 was fed with stock diet and tap water, Group 2 was fed with stock diet and 20% Fibersol-2B solution, Group 3 was fed with stock diet and 5% Fibersol-2 solution, Group 4 was fed with stock diet and 10% Fibersol-2 solution, and Group 5 was fed with stock diet and 20% Fibersol-2 solution. Deionised water (15 ml) was added to 1g of caecal content taken at the end of the experiment and the pH measured. For determination of short chain fatty acids, caecal content was added to isocupric acid and short chain fatty acids were extracted with chloroform-methanol mixture for analysis by gas chromatography. Acetic acid, propionic acid, butyric acid, isobutyric acid and valerianic acid were used as standards. Results Weight of the caecum including the caecal contents increased significantly in the groups fed Fibersol-2 and Fibersol-2B compared with the control group. Dried faecal weight and total faecal bile acid excretion increased in the groups fed Fibersol-2 and Fibersol-2B compared with the control group, but not proportionate to the concentrations of Fibersol-2 and Fibersol-2B fed to the rats. Short-chain fatty acids in the caecal content was significantly higher in the rats fed Fibersol-2 and Fibersol-2B than in the control group and the increase was proportional to the concentrations of Fibersol-2 and Fibersol-2B fed to the rats. Acetic acid content was highest, followed by propionic acid and butyric acid. The caecal contents were weakly alkaline for the control group, while they were weakly acidic for both Fibersol-2 and Fibersol-2B, consistent with the increase in short-chain fatty acid production. Bile excretion and short-chain fatty acid production following Fibersol-2 ingestion (Kishimoto et al., 1995) Test material: Fibersol-2 Test species: Rats, male Sprague-Dawley, 6 weeks old Dose: 5% Fibersol-2 Guidelines: Not stated Study conduct 3 week old SD rats were fed a high-carbohydrate diet containing sucrose, casein, corn oil, mineral mix (MM-2), vitamin mix (Harper), choline chloride, and vitamin E for 2 weeks. The rats were then divided into 4 groups: Group 1 was continued on the high-carbohydrate diet; Group 2 was fed 95% high-carbohydrate diet plus 5% Fibersol-2; Group 3 was fed 95% high-carbohydrate diet plus 5% citrus pectin (high viscosity fibre); and Group 4 was fed 95% high-carbohydrate diet plus 5% corn-fibre (insoluble fibre). Animals were given free access to feed. Caecal contents were weighed and the amounts of short-chain fatty acids produced were determined in the faeces for 3 days and bile acids were determined as outlined in Wakabayashi et al. (1991). In this study, Fibersol-2, citrus pectin and corn fibre were also incubated together with rat caecal contents under static culture conditions, and examined for fermentation changes into short-chain fatty acids (acetate, propionate and butyrate) and lactate as their precursor. Results The amounts of short-chain fatty acids produced were greater in the rats fed Fibersol-2 or citrus pectin compared with the control, while production of short-chain fatty acids for the group fed corn fibre did not differ significantly from the control group. Caecal propionate production was significantly correlated with serum total cholesterol implying that the propionate production may be involved in the regulation of serum cholesterol in the Fibersol-2 group (p<0.001) as well as in the citrus pectin group (p<0.02). A significant correlation was also obtained for the bile acid excretion and serum total cholesterol. With respect to the incubation of rat caecal contents with Fibersol-2, citrus pectin and corn fibre, propionate production was higher for Fibersol-2, however, more short-chain fatty acids were produced from citrus pectin than from Fibersol-2 in 24 hours. The production of short-chain fatty acids from the insoluble corn fibre was extremely low. Conclusions These findings, together with the aforementioned in-vivo digestion study, indicate that Fibersol-2, and to a lesser extent, Fibersol-2B, escape digestion and absorption in the upper gastrointestinal tract. Upon reaching the large intestine, Fibersol-2 and Fibersol-2B are partially fermented by bacteria, producing short-chain fatty acids. It is estimated that approximately 90% of Fibersol-2 and 60% of Fibersol-2B reach the large intestine. Intestinal bacteria ferment approximately half of the resistant maltodextrins that reaches the large intestine primarily into acetate, propionate and butyrate. The remaining resistant maltodextrins are excreted. 2.2.2 Acute toxicity studies Two acute toxicity studies are described below, one has Fibersol-2 as the test material, while the other uses Fibersol-2B. Acute toxicity of Fibersol-2B (Matsutani Chemical Industry Co. Ltd. ed.: Review: Safety of Pinefibre, 1990) Test material: Fibersol-2B Test species: DDY male mice (SPF, 5 weeks old) divided into 3 groups with 10 mice per group. Dosed by oral administration of solution/suspension at volume of 0.5 ml/10g body weight by gavage. Dose: 10, 20, 40g/kg body weight Guidelines: Not stated Test material Fibersol-2B was suspended in purified water at the maximum concentration physically possible of 80 % w/v and then diluted to prepare 40 and 20% w/v solutions. Study conduct After 1 week pre-feeding, the mice were divided into 3 groups (10, 20 and 40g/kg body weight). They were fasted for 18 hours before the test and administered the solution or suspension of Fibersol-2B at a volume of 0.5 ml/10g body weight with stomach sonde. After the administration, the mice were observed generally for 5 hours to check for any unusual symptoms and were observed continuously once a day in the morning for the following seven days. Body weight was checked before the test and one, four and seven days after the administration. After the 7-day observation period, all mice were dissected and the major thoracoabdominal organs were examined. Results After 1 week pre-feeding, the mice were divided into 3 groups (10, 20 and 40g/kg body weight). They were fasted for 18 hours before the test and administered the solution or suspension of Fibersol-2B at a volume of 0.5 ml/10g body weight with stomach sonde. After the administration, the mice were observed generally for 5 hours to check for any unusual symptoms and were observed continuously once a day in the morning for the following seven days. Body weight was checked before the test and one, four and seven days after the administration. After the 7-day observation period, all mice were dissected and the major thoracoabdominal organs were examined. Acute toxicity of Fibersol-2 (Wakabayashi et al., 1992) Test material: Fibersol-2 Test species: Male mice (Slc: ICR, SLC) Dose: 5, 10, 20g/kg body weight administered as a single oral dose Guidelines: Not stated Study conduct Acute toxicity was determined after a 7-day observation period of 3 groups of 10 male mice that received single oral administration of Fibersol-2 at 5, 10 and 20g/kg body weight. After the 7-day observation period, all mice were dissected and the major thoracoabdominal organs were examined. Results The maximum administration in this study did not cause death during the observation period. From these results, the LD50 for Fibersol-2 was estimated at more than 20g/kg body weight. In all groups, spontaneous movement was slightly suppressed over a period of 10 minutes following administration. In the high dose group (20g/kg body weight), all animals presented with diarrhoea at 2-3 hours following administration and excretion of soft faeces after one day. In the moderate dose group (10g/kg body weight) most animals presented with diarrhoea at 2-3 hours following administration and excretion of soft faeces at one day. In the low dose group (5g/kg body weight), excretion of soft faeces was noticed in a few animals. There were no other noticeable changes in general health conditions in all groups. All animals were subjected to autopsy on the last day of observation and no changes were present in any major organ in the chest or abdomen. Conclusion The results of acute toxicity studies are summarised in Table 2. The LD50 values of greater than 20g/kg bw for Fibersol-2 and 40g/kg bw for Fibersol-2B are quite high and it is highly unlikely that people would physically be able to consume this amount from food. While these values cannot be directly compared with LD50 values for other water-soluble fibres because of the different test animals used, the LD50 values for Fibersol-2 and Fibersol-2B are higher than for arabic gum, guar gum and sorbitol (Food Additives Handbook) as stated in the report by Matsutani et al. (1990), indicating that both Fibersol-2 and Fibersol-2B are safe substances. Table 2: Acute toxicity (LD50g/kg body weight) Administration pathAnimalGenderResultP.O.DDY mouseMale>40g/kg body weight, no death was observedOral gavageMouse (Slc: ICR, SLC)Male>20g/kg body weight, no death was observed 2.2.3 Sub-chronic studies One sub-chronic animal study in rats is available which measured blood biochemical and physical parameters. Fibersol-2 and Fibersol-2B 5-week dietary study in rats (Wakabayashi et al., 1991) Test material: Fibersol-2 Test species: SD male rats (5 weeks old) Dose: Groups 1-5 fed for 5 weeks on stock diet and tap water, 20% Fibersol-2B, 5% Fibersol-2, 10% Fibersol-2 and 20% Fibersol-2 solution respectively. Guidelines: Not stated Study conduct Five-week old SD male rats (CE-s, Nippon Crea) were divided into 5 groups (8 rats per group) after pre-feeding with stock feed for 1 week. For the test period, Group 1 was fed with stock diet and tap water, Group 2 was fed with stock diet and 20% Fibersol-2B solution, Group 3 was fed with stock diet and 5% Fibersol-2 solution, Group 4 was fed with stock diet and 10% Fibersol-2 solution, and Group 5 was fed with stock diet and 20% Fibersol-2 solution. Each week body weight was checked and at the end of the 5-week observation period, blood was drawn from the heart and the weights of internal organs were recorded. Blood biochemical measurements taken were: total cholesterol, HDL-cholesterol, triglycerides, protein, calcium, GOT and GPT. Results General observation over the 5-week period showed no abnormal changes. There were no differences in body weight, feed intake and feed efficacy among the groups. Total cholesterol levels in all test groups (Groups 2-5) were significantly lower compared with the control group. Other blood biochemical measures did not differ significantly across the groups. No abnormalities were observed in any major internal organ and there were no differences in organ weights among the groups. Conclusion No significant changes in blood biochemical measures such as liver function, HDL-cholesterol, triglycerides, protein or calcium levels were recorded. Reductions in total cholesterol were recorded. There were no significant changes in body weight or major internal organ weight and there were no abnormalities noted in the internal organs upon dissection. The results of this study do not indicate any safety problems where Fibersol-2 and Fibersol-2B are included in the diet at 20%. 2.3 Human studies 2.3.1 Acute studies 2.3.1.1 Determination of ED50 for diarrhoea Fibersol-2 and Fibersol-2B are not digested or absorbed in the upper gastrointestinal tract, but when they reaches the large intestine, it is partly fermented by bacteria, producing short-chain fatty acids. Fibersol-2 affects the absorption rate of carbohydrates in humans and this moderates postprandial blood glucose levels. The products of Fibersol-2 and Fibersol-2B in the large intestine, short-chain fatty acids, are expected to improve the intestinal microflora, intestinal regularity and immune function. The following study has estimated the ED50 for Fibersol-2B, that is, the single administration dose that results in diarrhoea in 50% of subjects. Human toleration single-administration study with Fibersol-2B in water (Satouchi et al., 1993) Purpose The purpose of this study was to investigate the effect of a single-administration of Fibersol-2B on the gastrointestinal function and defecation conditions in healthy adult volunteers. Study conduct Subjects were 74 healthy adults, aged 20-60 years old, 53 males (age 38.311.3 years, height 169.05.5 cm, body weight 64.07.1 kg) and 21 females (age 31.79.9 years, height 156.94.9 cm, body weight 50.35.7 kg). Subjects were orally administered Fibersol-2B at doses of 10, 20 or 40g dissolved in 100 ml of water after a breakfast meal at 9am. Each subject received each dose with at least one-week interval between administration and the order of dosage was randomly selected. 9 male subjects participated in a further stage of the experiment by ingesting 60g. Subjects were instructed to maintain their ordinary lifestyle including dietary habits. Usage of medication was discouraged, however, when medication was necessary, the name and dosage were recorded. Stool conditions and gastrointestinal conditions were observed in subjects for 48 hours following ingestion. Subjects completed a questionnaire by referring to a table with pictures of different types of stool conditions and recorded the time of defecation. Results Stools conditions tended to soften at all doses (10-60g) after intake of Fibersol-2B in comparison with conditions before oral administration in both males and females. Most of the stools were healthy in being banana shape or past-like and no clinical problems observed. No serious gastrointestinal conditions were observed, with mostly normal conditions: partially rumbling, flatulence or flatus. Muddy faeces were found following intake of 40g of Fibersol-2B, which was not seen after intake of 10 or 20g, however, this symptom disappeared within 48 hours after intake. Occurrence of diarrhoea following intake of 40g Fibersol-2B was 2.5% (male) and 5.3% (female). None of the 9 male subjects who took 60g Fibersol-2B experienced diarrhoea, no female subjects experienced diarrhoea at 10g or 20g Fibersol-2B intake and no male subjects experienced diarrhoea at 60g intake. T These results, such as 2.5% males experiencing diarrhoea after intake of 40g Fibersol-2 while no males experienced diarrhoea at the higher 60 g dose, highlight the range of individual responses. The single administration volume for 50% occurrence of diarrhoea (ED50, the effective dose for 50% diarrhoea) was estimated from a graph with intake volume on the horizontal axis (10 and 20g for male, and 20 and 40g for female) and diarrhoea occurrence on the vertical axis. The ED50 was estimated as 156g for male and 118g for female. The average body weight was 64.07.1 kg for males and 50.35.7 kg for females, giving an ED50 value of 2.4g/kg body weight for both males and females. Conclusion The reported ED50 values for fructooligosaccharides (indigestible oligosaccharide) is 0.8g/kg body weight while the reported ED50 for sorbitol (a sugar alcohol) is 0.5g/kg body weight, both of which are much lower than the ED50 for Fibersol-2B. It is postulated that the higher ED50 for Fibersol-2B compared with other indigestible saccharides is due to its higher molecular weight and lower osmotic pressure. The estimate of ED50 is likely to be an overestimate since it was calculated for both males and females from the dose that produced highest occurrence of diarrhoea. The dose, which produced the highest occurrence of diarrhoea, was not the highest dose administered for males. For females, the ED50 was calculated from the proportion of diarrhoea at 2 doses, 10g and 20g, however, at 10g no diarrhoea occurred. An estimate of the ED50 for Fibersol-2 was calculated based on the results of the Fibersol-2B study (Satouchi et al., 1993) using an adjustment factor for the increased fibre content of Fibersol-2 as compared with Fibersol-2B. The ED50 for Fibersol-2 estimated in this way is 1.4g/kg body weight. The assumptions and methodology applied in this calculation of an estimated ED50 for Fibersol-2 were not supplied. Fibersol-2B is considered safe for human consumption at dose levels of 60g in a single administration, which was the highest dose administered in this study and this equates from the graph, to approximately ED10 to ED20 for both male and females (that is, occurrence of diarrhoea in 10 to 20% of subjects). 2.3.1.2 Glucose tolerance studies The following single-administration studies of Fibersol-2 in humans were conducted to investigate the effect of Fibersol-2 on glucose tolerance. Water-soluble dietary fibres such as pectin and guar gum help to lower plasma glucose levels and reduce insulin secretion following glucose loading. The mechanism described is that insulin secretion decreases because these water-soluble fibres with high viscosities cause the digestive tract to delay the absorption of nutrients, leading to a gradual increase in blood glucose levels. Fibersol-2 and Fibersol-2B are water-soluble fibres with low viscosity. It was hypothesized that Fibersol-2 ingested with or following a meal (or glucose, sucrose or maltodextrin loading) would also improve glucose tolerance and the following single-administration studies were performed in order to confirm this hypothesis. However, the possibility of Fibersol-2 ingestion being associated with gastrointestinal symptoms or hypoglycaemia was also raised. Therefore, a review of any adverse effects observed in these studies can assist in determining the safety of Fibersol-2. Human toleration single administration study with Fibersol-2 contained in tea (Tokunga & Matsuoka, 1999) Study conduct The test beverage contained 5.12g Fibersol-2 in a 340g canned tea beverage mix (roasted tea, oolong tea, black tea and Vitamin C). A total of 40 subjects undertook the single administration test, 32 males aged 25-49 years and 8 females aged 25-28 years. The following physical measurements were obtained: height; body weight; waist and hip circumference; and Body Mass Index (BMI) and waist/hip ratio (WHR) were calculated. The subjects were starved after breakfast at 7am until 12pm when fasting blood glucose was determined by a self-monitoring glucose analyser (Taito-Bayer-Sankyo Co. Ltd.). Subjects were then given either green tea (control) or the 340g tea beverage containing Fibersol-2 within 15min after a meal (Japanese noodles and rice with topping containing 16g protein, 9g fat, 105g carbohydrates, with a total energy of 580 kcal). Blood glucose levels were measured at 30, 60 and 120 minutes after the beverage consumption. Subjects were blind to beverage loading and performance of the random loading was crossed over at intervals of 3-7 days. Increases in blood glucose levels between the two loading periods were compared and changes in blood glucose were monitored for 6 male subjects administered the Fibersol-2 containing beverage alone. Results Physical measurements of the group of 40 subjects are as follows for male: height 1691.1 cm, body weight 68.62.1 kg, BMI 23.80.6, WHR 0.870.01, body fat 22.71.1%; and for females: height 1581.6 cm, body weight 50.51.5 kg, BMI 20.10.7, WHR 0.70.03, and body fat 21.71.1%. The peak blood glucose level with Fibersol-2 loading following the meal declined compared with the control in 33 of the 40 subjects (83%). The area under the mean blood glucose curve was significantly lower with Fibersol-2 loading (74.24.8 mg min/dl) compared with the control (105.46.5 mg min/dl). Of 18 subjects with exceedingly high peak blood glucose values, the peak blood glucose levels was lower with Fibersol-2 compared with the control and a decrease in the area under the mean blood glucose curve with Fibersol-2 occurred for all 18 of these subjects. Ingestion of Fibersol-2 did not result in any adverse effects such hypoglycaemia, diarrhoea or gastrointestinal disorders. Human toleration single administration study with Fibersol-2 contained in tea (Sinohara et al., 1999) Study conduct Test beverage contained 5g of Fibersol-2 with 1g of powdered natural green leaf tea dissolved in 100 ml hot water. The control beverage comprised 6g of powdered green tea dissolved in 100 ml hot water. Subjects were 39 healthy adult volunteers, 26 men and 13 women (age 33.28.0 years, BMI 22.43.2). A single-blind crossover study was conducted in which the subjects took either the control or test beverage and after at least one-day interval took the other beverage. The subjects fasted from 9pm the day prior to the study until the beverage was ingested at 9am on the day of the test. The subjects then ate a meal consisting of noodles and rice cake (14.g protein, 3.9g fat, 130.4g carbohydrates and 615 kcal energy). Blood glucose levels were determined before ingestion and at 30, 60 and 120 minutes after ingestion. Subjects were observed during the course of the study for any gastrointestinal symptoms. Results Four subjects were excluded from the statistical calculations because their fasting blood glucose levels were 120 mg/dl or above or their postprandial blood glucose level was 200 mg/dl or above after ingestion of the control beverage, which classifies them as diabetic. The remaining 35 subjects were divided into 2 groups on the basis of their blood glucose level 30 minutes following ingestion of the control beverage. Those subjects whose blood glucose level was 155 mg/dl or above (mean peak in postprandial blood glucose) at 30 minutes were allocated to Group A and those subjects whose blood glucose level was below 155 mg/dl were allocated to Group B. 22 subjects (19 men and 3 women) were allocated to Group A and 13 subjects (4 men and 9 women) were allocated to Group B. Fibersol-2 significantly suppressed postprandial blood glucose level 30 minutes after the meal compared with the control beverage in Group A, which showed higher initial blood glucose levels. Fibersol-2 did not have any effect on Group B which had lower initial blood glucose levels, however, Fibersol-2 did not induce hypoglycaemia in any of the subjects nor did it induce any gastrointestinal symptoms such as diarrhoea or abdominal bloating. Human toleration single administration study with Fibersol-2 contained in soft drink (Mizushima et al., 1999) Study conduct The soft drink (100 ml) contained 9.8g of Fibersol-2, as well as minor ingredients (flavours, preservatives, acidifier, caramel, sodium metaphosphate and sweetener) while the control drink (100 ml) contained only minor ingredients. Subjects were 25 healthy adult males (37.66.1 years, BMI 23.52.6) divided into 2 groups: Group A (10 subjects), which readily showed a rise in blood glucose; and Group B (12 subjects), which did not readily show a rise in blood glucose. Subjects fasted from 9pm on the day ingestion till 9am on the day of ingestion. Subjects then ingested either the test soft drink containing Fibersol-2 or a placebo drink with a starchy meal of noodles and boiled rice which contained 14.1g of protein, 2.8g of fat, 138.6g of carbohydrate and 636 kcal of total energy within 15 minutes. Blood samples were taken before ingestion, and then 30, 60 and 120 minutes after ingestion. Subjects were blind to beverage loading and performance of the random loading was crossed over after 7 days. Gastrointestinal symptoms experienced during the study such as diarrhoea and abdominal bloating were recorded. Results Of the 25 male subjects that participated in the study, three had fasting blood glucose levels of 126 mg/dl or above or a postprandial blood glucose level after ingestion of the control drink of 200 mg/dl or above and their data were excluded because they could be classified as diabetic according to the diagnostic criteria of diabetes mellitus of the Japan Diabetes Society. The peak in blood glucose 30 minutes after the meal was inhibited significantly with Fibersol-2 for Group A, but not inhibited significantly for Group B. There were no gastrointestinal symptoms such as diarrhoea or abdominal bloating, nor was hypoglycaemia induced in any of the subjects including the three that were considered diabetic. Human toleration single administration study with Fibersol-2 contained in tofu (Uno et al., 1999) Study conduct Subjects were 34 healthy adults, 17 males (age 40.611.9 years, body fat 20.74.8 %, BMI 21.92.8, WHR 0.860.06) and 17 females (age 38.411.2 years, body fat 27.95.4, BMI 21.92.9, WHR 0.770.05). The test meal consisted of 150g tofu containing 5g indigestible dextrin (form not specified) and carbohydrate rich foods (noodles and rice with 639 calories, 3g fat, 140g carbohydrate, and 13g protein), while the control meal was identical except the tofu did not contain any indigestible dextrin. Subjects were starved from 9pm the day prior to the test and fasting blood glucose levels were measured at 8.30am on the day of the test. Subjects were then given the test or control meal and blood glucose was measured at intervals of 30, 60 and 120 minutes following ingestion. Groups were crossed over after a 1-week interval. Results The test results of 2 subjects were omitted from the statistical analysis because their peak postprandial blood glucose levels were higher than 200 mg/dl and they would be classified as diabetics. Another 2 subjects were omitted from the analysis because their peak postprandial blood glucose levels were lower than their starving blood glucose levels. Subjects were then divided into 2 groups according to the average blood glucose level at 30 minutes after the meal: Group A had a postprandial blood glucose level at 30 minutes of 138 mg/dl or more; and Group B had a postprandial blood glucose level at 30 minutes of less than 138 mg/dl. The blood glucose levels at 30 minutes after the meal were significantly lowered by the intake of indigestible dextrin containing tofu for Group A, but indigestible dextrin had no effect on Group B. None of the subjects showed any signs of hypoglycaemia and no adverse gastrointestinal symptoms were observed. Human toleration single administration study with Fibersol-2 contained in miso-soup (Kishimoto et al., 2000) Study conduct Subjects were 27 healthy adult males. Three types of freeze-dried instant miso-soups (awase, akadashi and shiromiso) containing the same ingredients (spinach, fried bean curd, wakame and welsh onion) were supplemented with either Fibersol-2 (test) or maltodextrin (control). The miso-soups were given to subjects after reconstitution with 160 ml of hot water. The composition of these soups is summarised in table 3. Table 3: Contents of test miso-soups ingested Miso soupProteinFatCarbohydrateSodiumDietary FibreAwase2.01.04.84434.4Akadashi2.00.84.74484.7Shiromiso2.31.04.54644.8 Subjects fasted for 4 hours from 8am after having breakfast. Blood glucose levels were measured at 12pm and the trial subjects then ingested either awase miso-soup containing Fibersol-2 or the control within 15 minutes. Blood glucose was measured at 30, 60 and 120 minutes following ingestion. Subjects were double blind to the test/control meals, which were randomly assigned and ingested at intervals of 2-3 days. On the basis of mean peak glucose level after ingestion of the control meal, the trial subjects were categorized into 2 groups: Group H who tended to have higher blood glucose levels after the meal; and Group L who tended to have lower blood glucose levels after the meal. In addition, 8 subjects received all three types of miso-soups to compare the blood glucose moderating effects of the three soups. Any adverse gastrointestinal symptoms observed during the trial were recorded. Results Awase miso-soup containing Fibersol-2 significantly reduced the postprandial rise in blood glucose levels with a more marked reduction in subjects who tended to have higher blood glucose levels. No difference was noted in the blood glucose moderating effects of the three miso-soups. No adverse gastrointestinal symptoms or hypoglycaemia was observed during the study. Human toleration single administration study with Fibersol-2 (Wakabayashi et al., 1999) Study conduct Oral sugar loading test Subjects were 5 healthy adult males (age 30.21.6 years, height 173.42.4 cm, body weight 61.61.8 kg, BMI 20.50.9). Subjects were starved from 9pm the day prior to the study, while on the day of the study both food and drink were restricted. On the day of the study, subjects received: (1) 150 ml carbonated water with 50g glucose; (2) 300 ml of carbonated water with 100g sucrose; (3) 150 ml of carbonated water with 50g maltodextrin (2.5% glucose, 7% maltose, 9% maltotriose, and 81.3% oligosaccharides/dextrin); (1) (3) were either with or without 10g Fibersol-2; or (4) 150 ml of carbonated water with 10g Fibersol-2. These tests were conducted at one-week intervals. Blood samples were collected before loading, 30 min, 60 min and 120 min after loading (except for the sucrose loading study for which blood samples were only collected to 60 min). Meal loading test Subjects were 10 healthy males (age 36.23.1 years, height 165.15.0 cm, body weight 58.52.9 kg, BMI 21.40.8). Subjects were starved after breakfast at 7am on the day of the study and blood glucose levels were determined at 12pm. A meal was consumed immediately after that comprising Kitsune Udon and rice (protein 16g, fat 9g, carbohydrate 105g and total calories 565) with green tea either with or without 5g Fibersol-2. Blood glucose levels were measured at 120 minutes following the meal. Cross-over was performed after 1 week interval. Using a similar procedure, healthy subjects (10 males and 14 females) were administered sweet rolls with sweet bean jam (protein 13g, fat 5g, carbohydrate 114g, total calories 553) with 100 ml of coffee containing 7g of Fibersol-2 within 15 minutes and then blood glucose levels measured at 120 minutes after the meal. Results Oral sugar loading test Fibersol-2 did not affect the blood glucose response following glucose loading, however, the insulin secretion was decreased significantly. Following sucrose loading, Fibersol-2 decreased both the blood glucose and insulin secretion. Following maltodextrin loading, Fibersol-2 decreased insulin secretion but not blood glucose. Following Fibersol-2 loading alone, blood glucose and insulin secretion showed a very small rise, which was not statistically significant in comparison with the baseline measurements. No gastrointestinal symptoms, e.g. diarrhoea, were observed. Test meal loading Fibersol-2 decreased the peak in post meal blood glucose level to 87% of the peak in the post control meal blood glucose level at 30 min with Udon noodles and rice. Fibersol-2 decreased the peak in post meal blood glucose level to 84% of the peak in the post control meal blood glucose level at 30 min with the sweet rolls meal. Again, no gastrointestinal symptoms were observed. Conclusions The single-administration studies indicate that resistant maltodextrin causes a reduction in postprandial blood glucose levels following a meal, more markedly in subjects who tended towards higher blood glucose levels. Relevant to the safety is the fact that ingestion of resistant maltodextrin did not induce hypoglycaemia in any subjects, even those with lower blood glucose levels. In addition, no adverse gastrointestinal symptoms were observed in any of the studies at dose levels up to 10g in a single dose. 2.3.2 Sub-chronic studies A number of sub-chronic human studies investigating the effects of Fibersol-2 or Fibersol-2B on blood biochemical, urine and physical parameters are available for a range of food products. Studies have been conducted with healthy, diabetic, hyperlipidemic and hyperglycaemic subjects. Human toleration 13-week study with Fibersol-2 contained in tea (Kajimoto et al., 2001) Study conduct Sample: sample beverage was a tea blend (green tea, barley tea, oolong tea, roasted tea, Jobs tear tea) containing 6.1g of Fibersol-2 (equivalent to 5.5g of soluble dietary fibre) and also vitamin C. Subjects: subjects were 16 healthy adults (8 male, 8 female), aged 23-48 years old (29.26.2). Study was conducted in accordance with the Helsinki declaration of 1964. Schedule: for 3 months (13 weeks), from 25 July 2000 to 24 October 2000, subjects ingested 250 ml of the tea blend 3 times daily at meal times. During the study, subjects were instructed to avoid consuming dietary supplements and not to change their ordinary lifestyle. Examination of blood: blood was obtained 4 times in total: before the study; at 1 month, 2 months and 3 months. The blood was examined for haematological counts (white blood cells, red blood cells, haemoglobin (Hb), hematocrit (Ht), platelets, aspartate aminotransferase (AST, GOT), glutamate pyruvate transaminase (GPT), alkaline phosphatase (ALP), gamma-glutamyltranspeptidase (-GTP), lactic dehydrogenase (LDH), leukocyte alkaline phosphatase (LAP), total proteins, albumin, triglycerides, total cholesterol, blood glucose, glycosylated haemoglobin (HbA1c), fructosamine, blood urea nitrogen (BUN), creatine, uric acid, creatine kinase, sodium (Na), chloride (Cl), potassium (K), calcium (Ca), magnesium (Mg), iron (Fe) and ferritin. Blood examination was conducted at Sagamino Hospital (Sagamihara, Kanagawa, Japan) by collecting fasting blood samples (fasting period was 10pm on day prior to collection to 11am on day of collection). Blood samples were collected in the sitting position after at least 5 minutes rest. The collected blood samples were analysed on the same day. Urine Examination: urine samples were collected within 24 hours of blood collection and analysed for specific gravity, pH, urinary glucose, urinary protein, urinary ketone bodies and urinary blood. Blood pressure and physical examination: the following measurements were made at the time of blood and urinary analyses: blood pressure, height, body weight, waist, hip, and body fat (Omron HBF-303, personal body fat metre). BMI and WHR were calculated from those measurements. Interview: at the same time as the blood/urine sample collection and measurements were made, the subjects were asked about sickness, nausea, vomiting, faecal characteristics and other subjective symptoms. Daily report: the subjects recorded the following details twice a week (dates uniformly predetermined): meals, snacks and alcohol consumed; body weight; body fat ratio; exercise including pedometer counts (Seiko WZ100A); physical condition and medication taken. Statistical analyses: paired one-way analysis of variance was used to analyze the measurements and in the case where main effects in subjects were found and multiple comparisons were applicable, multiple comparison analysis by Dunnet test was applied. All statistical analyses employed two-side test with significant levels less than or equal to 5% using SPSS Advanced model. Results Subjects: two subjects (1 male and 1 female) were omitted from this study because they required medication during the study period. The required medication was unrelated to the study, the male suffered persistent fever from infection at the root of a tooth while the female suffered from a systemic rash caused by systemic lupus erythematosus. The results for the remaining 14 subjects (7 male and 7 female) were used in the calculation. Blood examination: some significant changes from baseline by gender were observed for at particular months for: LDH; albumin; total cholesterol levels; fructosamine; BUN; uric acid and ferritin. However these were changes within normal ranges. Changes in measurements outside the limits of normal ranges were observed for some individuals for GPT (2 males at 1 month) and total cholesterol (1 male at 1 month and 1 female at 1, 2 and 3 months). The GPT changes were assessed as not clinically significant because the total alcohol consumed in the month for both of the males was large and the changes were transient. The abnormal changes in total cholesterol for the male were assessed to be not clinically significant since the pretest value was on the border of the normal range and his total cholesterol values were in the normal range at 2 and 3 months). The abnormal changes in total cholesterol for the female were assessed to be not clinically significant since the pretest value was on the border of the normal range. Urine examination: The average values for specific gravity were significantly different at 2 and 3 months in males and 3 months in females, however, the changes were within the normal range and not clinically significant. No other significant changes were observed. Blood pressure and physical examination: there were significant changes in body fat for males at 1 and 2 months however, the changes were within the normal range and there were no associated problems. There were no significant changes in any of the other measurements. Interview: no serious symptoms or adverse events were reported during the study. No clinical abnormalities were observed in haematological examination, hepatic function, renal function, glucose metabolism, fat metabolism, electrolyte metabolism, blood pressure nor through physical examination. Human toleration 12-week study in diabetic subjects with Fibersol-2 containing diet (Nomura et al., 1992) Study conduct Five non-insulin dependent diabetes mellitus (NIDDM) patients with hyperlipidemia (565 years) received a diet therapy (25-30 kcal/kg ideal body weight). Following the treatment, their hyperlipidemic conditions were rechecked and 60g/day of Fibersol-2 (20g/meal) was administered for 12 weeks. The dose to NIDDM patients was 1g/kg body weight on average. The dose of Fibersol-2 was determined based on the LD50 for Fibersol-2B of more than 40g/kg body weight (no death occurred). Blood samples were collected under fasting conditions before the administration period, then at 2, 4, 8 and 12 weeks. The following measurements were taken: fasting plasma glucose (FPG); cholesterol; high density lipoprotein (HDL)-cholesterol; triglycerides; Ca; Mg; phosphorus (P); Fe; red blood cell count (RBC); GOT; GPT; -GTP; and LDH. Subjects were also asked about any symptoms. Results Blood cholesterol levels were significantly reduced at weeks 4, 8 and 12 weeks during the administration period, while serum cholesterol levels were significantly reduced at weeks 4 and 8 weeks of the administration period (but the result was not significant at 12 weeks due to the scatter of individuals values). Fasting blood glucose levels were significantly reduced after 12 weeks of administration. No significant changes in other serological values were noted, e.g. Fe, Ca, RBC or hepatic indicators. No adverse reactions such as diarrhoea or intestinal pains were observed in this study. Human toleration 1-month study in healthy and hyperlipidemic patients with Fibersol-2 contained in canned tea beverage (Tokunaga & Matsuoka, 1999) Study conduct The beverage was a 340g canned tea (roasted tea, oolong tea and black tea) beverage with 5.12g of Fibersol-2 and Vitamin C. A total of 40 subjects underwent a single-intake test, which was discussed previously in this assessment, while 10 volunteers (32-59 years, mean 48.33.4 years) were further tested with continual administration for a period of 1 month with 1 can per meal. Subjects were instructed not to alter their usual physical activities, dietary habits or any other aspect of their lifestyle. Physical parameters were obtained including height, body weight, and waist and hip circumference. BMI and WHR were derived from the measurements. Body fat was determined using a body-composition analyzer-attached scale (TBF-501, Tanita Co. Ltd.). Fasting blood samples were collected and the following analyzed: serum lipids; serum total cholesterol, HDL-cholesterol and triacylglycerol; fasting blood glucose; HbA1c; total protein; total bilirubin; uric acid; nitrogen in urea; creatinine; GOT (AST); GPT (ALT); -GTP, LDH; LAP; creatine phosphokinase (CPK); Na; Cl; K; Ca; RCB; Hb, Ht, white blood cell count (WBC) and platelet counts. Results Based on the WHO criteria for hyperlipidemia, of the 10 volunteers (height: 164.11.1 cm; body weight: 68.12 kg; BMI: 25.30.6; WHR: 0.890.01), 3 were categorized as type IIb hyperlipidemic, 4 were categorized as type IV hyperlipidemic and 3 indicated normal readings. All subjects except for one normal subject had lower blood glucose levels after administration period. The 3 subjects with hyperlipidemia type IIb showed decreases in serum total cholesterol levels, although the mean serum total cholesterol for all 10 subjects after administration period was not significantly different compared with pre-administration values. Although increases in HDL-cholesterol levels in 8 of the 10 subjects were noted, the mean post-administration value did not differ significantly from the mean pre-administration value. Triacylglycerol levels decreased in all subjects after the administration period and this difference was significant. There were no other significant changes in biochemical or haematological parameters between pre- and post-administration and no clinical problems were observed. No adverse effects such as hypoglycaemia, diarrhoea or gastrointestinal upset were observed. Human toleration 3-month study in hyperglycaemic patients with Fibersol-2 contained in miso-soup (Kishimoto et al., 2000) Study conduct 10 subjects who were classified as hyperglycaemic (i.e. showed a tendency for a rise in blood glucose following a meal) took part in this study. Three types of freeze-dried instant miso-soups (awase, akadashi and shiromiso) containing the same ingredients (spinach, fried bean curd, wakame and welsh onion) were supplemented with either Fibersol-2 (test) or maltodextrin (control). The miso-soups were given to subjects after reconstitution with 160 ml of hot water. The composition of these soups was summarised in section 2.3.2. Subjects consumed the miso-soups three times daily for 3 months. Subjects were instructed to maintain their normal lifestyle including exercise and dietary habits. The following measurements were obtained immediately prior to the study and at 1, 2 and 3 months into the test period: body weight; waist circumference; hip size; body fat content; blood pressure; pulse; blood biochemical parameters such as total protein, albumin content and actin to gelsolin ration (A/G); liver functional parameters such as GOT, GPT, ALP, LDH, cholinesterase (ChE), LAP, -GTP and CPK; kidney functional parameters such as uric acid, urea nitrogen content and creatinine; electrolyte values such as Na, Cl, Ca, P and Fe; lipid metabolic parameters such as total cholesterol, HDL-cholesterol and triglycerides; sugar metabolic parameters such as glucose, fructosamine and HbA1c; haematological parameters such as leukocyte count, red blood cell count, Hb, Ht, mean corpuscular volume (MCV, MCH), mean corpuscular haemoglobin concentration (MCHC), platelet count and specific gravity; and urinary analysis such as specific gravity, pH, urobilinogen, bilirubin, ketone body, protein, glucose and occult blood. Results There was no significant difference in any of the physical parameters. After one month, serum triglyceride level was significantly reduced and total cholesterol levels declined (though not significantly). The Cl level had significantly decreased after 3 months but was still within the normal range. Other measurements were not changed after the three-month period. No other adverse effects were observed throughout the test period. Human toleration 1-month study with Fibersol-2 contained in soft drink (Mizushima et al., 1999) Study conduct The soft drink (100 ml) contained 9.8g of Fibersol-2, as well as minor ingredients (flavours, preservatives, acidifier, caramel, sodium metaphosphate and sweetener) while the control drink (100 ml) contained only minor ingredients. 25 healthy adult males were recruited to undertake a single-administration study (reported in this assessment) and of these, 3 subjects (age 35.03.6 years; BMI 24.12.1) were recruited to continue taking Fibersol-2 for a repetitive administration study. Subjects ingested the test drink three times a day at each meal for 1 month. Blood and urine samples were collected at 4pm on the day prior to start of the test period and after 1 month. The following parameters were measured: red cell count; haemoglobin; hematocrit; platelet count; white cell count; liver function (GOT, GPT, ALP, zinc turbidity test (ZTT), -GTP, bilirubin and total protein); renal function (BUN, serum creatinine, uric acid); urine analysis (protein, sugar, urobilinogen, bilirubin, ketones, occult blood and pH); total cholesterol; HDL-cholesterol; triglyceride; whole blood specific gravity; serum amylase; HbA1c; fasting blood glucose; and blood pressure. Results There were no significant changes in any of the major parameters measured. However, there were non-significant favourable changes in triglyceride and HDL-cholesterol. No gastrointestinal symptoms or hypoglycaemia were observed or reported in any of the subjects during the 1 month period. Human toleration 12-week study in hyperglycaemic patients with Fibersol-2 contained in soft drink (Mizushima et al., 2000) Study conduct 100 ml bottles of soft drink were ingested, containing 9.8g of Fibersol-2. The nutritional composition was: energy 4 kcal; carbohydrate 1.1g; sodium 11.6 mg; and protein and lipid 0 g. Subjects were adult males with hyperglycaemia or borderline hyperglycaemia (blood glucose of 100 to 130 mg/dl) at a regular health check (age 44.46.9 years; body fat 25.75.9%; BMI 25.43.3; and fasting blood glucose level of 113.713.5 mg/dl). Subjects fasted from 9pm on the day before the start of the trial. At 9am on the day of the trial blood samples and urine were collected for analyses, height, weight and body fat were measured and BMI was calculated. Subjects then received the test drinks daily at breakfast, lunch and supper for 12 weeks. Subjects were observed regularly and instructed not to modify their normal lifestyle. Subjects underwent blood tests, urinalysis and health checks at weeks 4, 8 and 12 and again 8 weeks after the trial. The following measurements were taken: Physical examination: body weight, body fat percentage, blood pressure, and pulse rate. Blood pressure and pulse rate were measured at the start of the trial, at week 12 and at 8 weeks post ingestion. Haematological examination: RBC, WBC, Hb, Ht, platelet count, MCV, MCH, MCHC, and whole blood specific gravity. Blood biochemical examination: Fasting blood glucose, HbA1c, fructosamine, Na, K, Cl, Ca, total protein, urea nitrogen, uric acid, creatinine, LAP, serum amylase, -GTP, CK, ZTT, GOT, GLP, ALP, LDH, total bilirubin, total cholesterol, HDL-cholesterol, triglycerides, and free fatty acids. Urinalysis: pH, urobilinogen, glucose, protein, occult blood, ketone bodies and bilirubin. Results Physical examination: no significant changes were found in body weight at weeks 4, 8, 12, or 8 weeks post-ingestion. Body fat decreased at weeks 8 (p<0.01) and 12 weeks (p<0.05) and 8 weeks post-ingestion (p<0.01). Haematological examination: no significant changes were found in any haematological parameters at weeks 4, 8, 12 or 8 weeks post-ingestion compared with pre-test values. Blood biochemical examination: fasting blood glucose and fructosamine levels in the ingestion and post-ingestion periods were significantly lower than their pre-test values (p<0.01) indicating an improvement in glucose metabolism. Triglycerides decreased significantly at week 4 (p<0.05) and tended to decrease at weeks 8 and 12 (though not significantly) compared to the pre-test value. Changes in other parameters such as electrolytes, protein metabolism, renal function, pancreatic function and hepatic function were within normal ranges and not significant. Urinalysis: there were no significant changes in any parameter compared with the pre-test value. At the start of ingestion, 3 of the 10 subjects had soft stools and an increase in defecation frequency, 2 subjects had slightly soft stools and an increase in defecation frequency and a sensation of flatulence, while 1 subject had a sensation of flatulence only. All of these symptoms were found in the initial ingestion period only and disappeared within one month without treatment. Otherwise, there were no adverse effects of clinical problems observed. Human toleration 4-12 week study with indigestible dextrin containing diet (Matsuoka et al., 1992) Study conduct Subjects were 10 healthy male volunteers; aged 33-59 years (mean 50.3 years), height 158-173 cm tall (mean 164.8 cm) and body weight 52 to 82 kg (mean 68.8 kg). Indigestible dextrin was dissolved in water at a concentration of 10g/100 ml and administered orally 3 times daily (30g indigestible dextrin/day) before each meal for 4 weeks. Two subjects then continued the administration regime at the same dose (30g/day) for an additional 4 weeks (8 weeks in total) while the remaining 8 subjects continued the administration regime on half the dose (15g/day) for an additional 4 weeks. The following measurements were taken prior to administration regime and 4 weeks after the start of administration: Physical examination: Body weight, blood pressure, and pulse rate. Haematological examination: RBC, WBC, Hb, Ht, MCV, MCH, MCHC, platelet count, reticulocyte count, differential leukocyte count, and fibrinogen. Blood biochemical examination: Fasting blood glucose, HbA1c, Na, K, Cl, P, Mg, Fe, Ca, protein, protein fraction, albumin, A/G, urea nitrogen, uric acid, creatinine, total bile acid, LAP, serum amylase, -GTP, CK, ChE, ZTT, thymol turbidity test (TTT), GOT, GPT, ALP, LDH, bilirubin, total cholesterol, HDL-cholesterol, triglycerides, free fatty acids, and lipoprotein fraction. Urinalysis: Specific gravity, pH, urobilinogen, sediments, glucose, protein, occult blood, nitrite, ketone bodies and bilirubin. Results Physical examination: there were no significant changes in body weight, blood pressure or pulse rate at 4 weeks in comparison with pre-test values. Haematological examination: the change in reticulocyte count from pre-test to 4 weeks was statistically significant, but within the normal range. Blood biochemical examination: there were no significant changes in the following blood biochemical parameters: glucose tolerance; electrolytes; protein metabolism; renal function; pancreatic function; and liver function. Total cholesterol level had decreased (not significantly) in all subjects except one at week 4 and had further decreased (not significantly) in all subjects including those whose dose was reduced by half from week 4 to week 8. HDL-cholesterol showed a change within normal range but the ratio of HDL-cholesterol to total cholesterol increased in 8 subjects at week 4 and 9 subjects at week 8 as compared with the pre-test value. Similar results were obtained for lipoprotein fraction. Triglyceride levels decreased during the study but not significantly. Free fatty acids decreased significantly throughout the study to be within the normal range. Urinalysis: the results of urinalysis were not discussed in the English translation of this paper. No other adverse effects such as gastrointestinal upset were observed. Human toleration 16-week study in diabetic subjects with indigestible dextrin containing diet (Fujiwara and Matsuoka, 1993) Study conduct Subjects were 5 outpatients (3 males and 2 females) within NIDDM (age 556 years; height 1622 cm; body weight 69.25.8 kg; and BMI 26.62.9). For the treatment of diabetes, four patients received diet therapy and an oral hypoglycaemic drug (Glibenclamide), while the other patient received diet therapy alone. The following complications were present, not for all subjects: hypertension; hyperlipidemia; and fatty liver. Four patients had good blood glucose control, while the other had poor blood glucose control as judged by HbA1c levels. Indigestible dextrin was dissolved in water at a concentration of 10 g/100 ml and given orally 3 times daily (30 g/day before each meal) as outlined in the previous study (Matsuoka et al., 1992) and administered for 16 weeks. Physical measurements, blood and urine samples were obtained before the start of administration, at weeks 4, 8, 12 and 16. The diet therapy and/or drug treatment on patients were continued for the entire study period unless significant changes were found. The following measurements were taken: Physical examination: body weight and blood pressure. Haematological examination: RBC, WBC, Hb, Ht and platelet count. Blood biochemical examination: fasting blood glucose, fructosamine, HbA1c, HbA1, 1,5-anhydroglucitol, ketone body fraction (acetoacetic acid, -hydroxybutyric acid), total cholesterol, HDL-cholesterol, triglyceride, -lipoprotein, free fatty acids, phospholipids, lipoprotein fraction, apoprotein fraction, Ca, P, Mg, Fe, total protein, TTT, total bile acid, GOT, GPT, ALP, LDH, CK, LAP, lipase, urea nitrogen, uric acid and creatinine. Urinalysis: albumin, 1-microalbumin, 2-microalbumin and N-acetyl--D-glucosaminase (NAG). Results Physical examination: there was no significant change in body weight during the administration period compared with pre-test value. Both systolic and diastolic blood pressure showed a tendency to decrease gradually following the start of administration without a significant difference. Haematological examination: no significant changes were found in any parameter. Blood biochemical examination: fructosamine, HbA1 and HbA1c, which are indices of blood glucose, control showed no significant changes after administration. 1,5-anhydroglucitol showed a tendency to decrease gradually although the change was not statistically significant. Ketone body fraction tended to decrease for both acetoacetic acid and -hydroxybutyric acid although the ratio of these fractions did not change very much. There were significant beneficial decreases in triglyceride and -lipoprotein levels. Total cholesterol and HDL-cholesterol tended to decrease and increase respectively within normal ranges and the changes corresponded with an increase in -lipoprotein fraction and a decrease in -lipoprotein fraction. Free fatty acids showed an abnormally higher mean value at the start of administration and had decreased to within normal range by week 16, though this change was not significant. Apoprotein B showed a significant decrease at weeks 4 and 8. ALP, LDH and CK showed significant changes during the administration period, but the values were within normal ranges and were assessed to be of no clinical significance. There were no effects on Ca, P, Mg, Fe, liver or kidney function. Urinalysis: microalbumin decreased after administration with a significant difference at week 4 but no other parameters showed significant changes. Subjects reported that the feeling of hunger between meals was lessened. No adverse effects such as digestive symptoms like diarrhoea were reported. Conclusion The human toleration studies of Fibersol-2/indigestible dextrin (form not specified in some studies) in various food products indicate a tendency toward favourable changes in the parameters measured and no adverse effects. There was a tendency for: reductions in total cholesterol levels, fasting blood glucose levels, triglyceride levels and -lipoprotein levels; and increases in HDL-cholesterol and the ratio of HDL-cholesterol: total cholesterol. These changes were statistically significant in some studies. There were some statistically significant changes in some other blood biochemical and haematological parameters in some studies such as reticulocyte count (Matsuoka et al., 1992), LDH, albumin, fructosamine, BUN, uric acid and ferritin and GPT (Kajimoto et al., 2001), however, these changes were either within normal ranges or not clinically significant because of other factors external to the study (e.g. excess consumption of alcohol related to changes in GPT). There were no changes in any physical measurements such as body fat and no changes in urinalysis. In addition, no adverse effects such as gastrointestinal symptoms or hypoglycaemic responses were noted in any subjects. Therefore, Fibersol-2/indigestible dextrin (form not specified in some studies) did not produce any adverse effects at: dose levels up to 60g/day in diabetic subjects for 12 weeks; or dose levels up to 30g/day in diabetic subjects for 16 weeks; or 30g/day for 12 weeks in healthy subjects (healthy subjects were not subjected to a dosage regime of 60g/day). 2.4 Mutagenicity studies Mutagenicity studies have been performed for both Fibersol-2 and Fibersol-2B. Reverse mutation assay on Fibersol-2 in bacteria (Matsutani Chemical Industry Co. Ltd. ed.: Review: Safety of Pinefibre, 1990) Purpose To investigate the mutagenicity of Fibersol-2 by gene mutagenicity test using bacteria (Ames Test). Study conduct E. coli WP2uvrA, S. typhimurium TA98, TA100, TA1535, and TA1537 were used as indicative bacteria. In the metabolic inactivation method, Na-Pi buffer solution of S9 Mix, a fractionated SD male rat liver microsome prepared after intraperitoneal administration of Phenobarbital and 5,6-benzoflavone. Fibersol-2 was added at the amount of 40-5000 g/plate in the form of purified water solution. After incubating the plate containing 0.1 ml of bacteria suspension, 0.1 ml of the solution and 0.5 ml of the Na-Pi buffer and 2.0 ml of soft agar solution (Bacto-agar, Difco Lab) (2.7 ml in total) at 37oC for 48 hours, the reverse colonies per plate were counted. Na-Pi buffer solution of S9 Mix was used instead of Na-Pi buffer in the metabolic activation method. Results Fibersol-2 did not increase the number of reverse mutate colonies in comparison with the reference buffer solution in any strain of the tested bacteria at the amount of 40-5000 g/plate, not withstanding whether metabolically activated or not. The positive references AF-2, NaN3 and 9-AA increased the number of reverse mutate colonies without S9 Mix, and 2-AA also increased the number of reverse mutate colonies with S9 Mix. The reverse mutagenesis on bacteria of Fibersol-2 was determined to be negative. Reverse mutation assay on Fibersol-2B in bacteria (Wakabayashi et al., 1992) Purpose To investigate the mutagenicity of Fibersol-2B by gene mutagenicity test using bacteria (Ames Test). Study conduct E. coli WP2uvrA, S. typhimurium TA98, TA100, TA1535, and TA1537 were used as indicative bacteria. Positive references used were: AF-2 (2-(2-furyl)-3-(5-nitro-2-furyl)acrylamide); NaN3 (sodium azide); 9-AA (9-aminoacridine); 2-AA (2-aminoanthracene). Saline buffer was used as a reference solution. No further details provided. Results No mutagenicity was observed in S. typhimurium TA98, TA100, TA1535, TA1537 or E.coli WP2uvrA- in comparison with saline buffer. The positive references AF-2, NaN3 and 9-AA increased the number of reverse mutate colonies without S9 Mix, and 2-AA also increased the number of reverse mutate colonies with S9 Mix. Conclusion No mutagenicity was observed for either Fibersol-2 or Fibersol-2B in S. typhimurium TA98, TA100, TA1535, TA1537 or E.coli WP2uvrA- in comparison with reference buffer. 2.5 Studies on mineral absorption In-vitro study on mineral absorption (Matsutani Chemical Industry Co. Ltd. ed.: Review: Safety of Pinefibre, 1990) Purpose The purpose of this study was to evaluate the effect of Fibersol-2B on mineral absorption. Methods Cellulose membranes filled with metal ions in solution were used as a model system of the digestive tract. Each metal ion (3000 ppm of Na+, K+, Ca2+, Cu2+, Zn2+ and 1000 ppm of Fe3+) were separately added to 10 ml of Deionised water with 1% Fibersol-2B, and were filled into a cellulose dialysis membrane (Cellotube VT351, <3500 Mwpass, Nakarai Tesque) and then sealed. The tube was soaked in 500 ml Deionised water at 37oC. The diffused ion in the outer solution was measured for 180 min. In addition, apple pectin (Wako Pure Chemical), guar gum (Organo) and polydextrose (Pfizer) were examined. A solution containing no dietary fibre was used as a reference. Results No inhibition of any metal ion diffusion was observed in the presence of 1% Fibersol-2B in solution. In contrast, pectin and guar gum inhibited the diffusion of metal ions, particularly for Ca2+ and Cu2+. In-vivo study on mineral absorption (Matsutani Chemical Industry Co. Ltd. ed.: Review: Safety of Pinefibre, 1990) Purpose Examine serum calcium levels following administration of Fibersol-2 and Fibersol-2B. Methods Five-week old SD male rats were divided into 5 groups (8 rats per group) after pre-feeding with stock feed (CE-s, Nippon Crea) for 1 week. Groups 1-5 were fed the following diets for 5 weeks: Group 1 stock diet with tap water; Group 2: 20% Fibersol-2B solution; Group 3 5% Fibersol-2 solution; Group 4: 10% Fibersol-2 solution; Group 5: 20% Fibersol-2 solution. At the end of the 5 week period, blood was drawn to determine calcium content. Results Blood levels of calcium were not significantly different among the control and 4 test groups. Conclusion Some soluble dietary fibres such as pectin or guar gum are constituted from plant non-structural polysaccharides and their solutions are highly viscous or form gels and have been shown to reduce the absorption of some nutrients. The studies available did not indicate any effect of Fibersol-2 or Fibersol-2B on mineral absorption. The low viscosity of Fibersol-2 and Fibersol-2B is likely to have contributed to the lack of inhibition of mineral absorption. 3. Overall conclusion Fibersol-2, and to a lesser extent, Fibersol-2B are resistant to digestion and are poorly absorbed in the upper gastrointestinal tract. In the lower gastrointestinal tract, they are partially fermented by intestinal bacteria producing short-chain fatty acids, primarily acetate, propionate and butyrate. The remainder of Fibersol-2 and Fibersol-2B is excreted. Fibersol-2 and Fibersol-2B are considered safe for human consumption at all levels studied in humans (up to 60g in a single administration and 60g per day over three months). This conclusion is based on the following: Acute toxicity studies in animals indicate that the LD50 is more than 20 g/kg bw and 40 g/kg bw for Fibersol-2 and Fibersol-2B. Sub-chronic studies in rats showed no significant changes in blood biochemical measures, body weight, internal organ weight and no abnormalities in internal organs upon dissection when Fibersol-2 and Fibersol-2B are included in the diet at up to 20%. The single administration dose that produces diarrhoea in 50% of subjects was estimated to be greater than 100 g. Single-administration human studies show a reduction in postprandial blood glucose following a meal and no indication of hypoglycaemia or any adverse gastrointestinal symptoms at dose levels up to 10 g. Human toleration studies of up to four months on healthy subjects and diabetic subjects showed favourable changes in some blood and blood biochemical parameters such as reductions in total cholesterol, -lipoprotein, fasting blood glucose and triglycerides and increases in HDL-cholesterol. No other changes that were outside of normal ranges or clinically significant were detected in blood biochemical parameters, haematological parameters or urinalysis. There were no changes in physical parameters and no adverse gastrointestinal symptoms at dose levels up to 60g/day in diabetic subjects and 30g/day in healthy subjects (healthy subjects were not subjected to a regime of 60g/day in any of the studies). No mutagenicity was observed for either Fibersol-2 or Fibersol-2B in S. typhimurium TA98, TA100, TA1535, TA1537 or E.coli WP2uvrA- in comparison with reference buffer. Neither Fibersol-2 nor Fibersol-2B inhibit mineral absorption in in-vitro or in-vivo studies and this is attributed to their low viscosity. Reference List Fujiwara K and Matsuoka A (1993); Continuous administration testes of indigestible dextrin; II: Study on the effects of the improvement of fat metabolism in patients with non-insulin-dependent diabetes mellitus; J Jpn Clin Nutr, 83(3): 301-305. Kajimoto O, Yoshimura C, Morimoto F, Henmi M, Ohki K, Takahashi T and Takeuchi H (2001); Safety of a long-term intake of a tea beverage containing indigestible dextrin; J Nutritional Food, 4(2): 19-26. Kishimoto Y, Wakabayashi S. and Takeda H (1995); Hypocholesterolemic effect of dietary fiber: Relation to intestinal fermentation and bile acid secretion; J Nutr Sci Vitaminol, 41: 151-161. Kishimoto Y, Wakabayashi S and Yuba K (2000); Effects of instant miso-soup containing indigestible dextrin on moderating the rise of postprandial blood glucose levels and safety of long-term administration; J Nutritional Food, 3(2): 19-27. Matsuoka A, Saito M and Nagano S (1992); Continuous administration tests of indigestible dextrin; I: Study on the effects of the improvement of fat metabolism in healthy volunteers; J Jpn Clin Nutr, 80(2): 167-172. Matsutani Chemical Industry Co. Ltd. ed.: Review: Safety of Pinefibre, 1990. Mizushima N, Chiba Y, Katsuyama S, Daigo Y and Kobayashi C (1999); Effect of indigestible dextrin-containing soft drinks on blood glucose level in healthy human subjects; J Nutritional Food, 2(4): 17-23. Mizushima N, Chiba Y, Katsuyama S and Kobayashi C (2000); Effect of long-term ingestion of indigestible dextrin-containing soft drinks on safety and blood glucose levels; J Nutritional Food, 3(3): 75-82. Nomura M, Nakajima Y and Abe H (1992); Effects of long-term administration of indigestible dextrin as a soluble dietary fiber on lipid and glucose metabolism; J Jpn Soc Nutr Food Sci, 45: 21-25. Ohkuma K and Wakabayashi S (2001); Fibersol-2: a soluble non-digestible starch-derived dietary fibre in Advanced dietary fibre technology ed: McCleary BV and Prosky L; 44.1, p509-523. Okada K, Yoneyama M, Mandai T, Aga T, Sakai S and Ichikawa T (1990); J Jpn Soc Nutr Food Sci, 43: 23. Satouchi M, Wakabayashi S, Ohkuma K, Fujiwara K and Matsuoka A (1993); Effects of indigestible dextrin on bowel movements; Jpn J Nutr, 51: 31-37. Sinohara H, Tsuji H and Seto A (1999); Effects of indigestible dextrin-containing green tea on blood glucose level in healthy human subjects; J Nutritional Food, 2(1): 52-56. Tokunaga K and Matsuoka A (1999); Effects of a FOSHU (food for specified health use) containing indigestible dextrin as a functional component on glucose and fat metabolism; J Japan Diab Soc 42(1): 61-65. Uno K, Takagi K, Akaza M, Takagi N, Yoshio N and Maeda I (1999); Effect of indigestible dextrin-containing tofu on blood glucose level in healthy human subjects; J Nutritional Food, 2(4): 25-31. Wakabayashi S, Kishimoto Y, Nanbu S and Matsuoka A (1999); Effects of indigestible dextrin on postprandial rise in blood glucose levels in man; J Jpn Assoc Dietary Fiber Res, 3: 13-19. Wakabayashi S, Satouchi M, Nogami Y, Ohkuma K and Matsuoka A (1991); Effect of indigestible dextrin on cholesterol metabolism in rat; J Jpn Nutr Food Sci, 44: 471-478. Wakabayashi S, Satouchi M, Ueda Y and Ohkuma K (1992); Acute toxicity and mutagenicity studies of indigestible dextrin and its effect on bowel movement of the rat; J Food Hyg Soc Japan, 33: 557-562. Attachment 5 A491 Resistant Maltodextrin as Dietary Fibre Dietary Exposure Assessment Report Summary An application was received by FSANZ seeking to amend Standard 1.2.8 Nutrition Information Requirements of the Australian New Zealand Food Standards Code (the Code) to recognise resistant maltodextrins (RMD) as a dietary fibre and to include a specific method of analysis for dietary fibre in foods containing RMD. If RMD is recognised as a dietary fibre, it may be used in a variety of foods including canned goods, snack foods, sweeteners and various other products. A dietary exposure assessment was undertaken to determine the potential dietary impact resulting from the addition of RMD to a variety of foods in Australia and New Zealand. The dietary exposure assessment was conducted assuming that consumers do not change the amounts and general types of foods that they eat. Food consumption data from the most recent Australian and New Zealand National Nutrition Surveys (NNSs) were used; the 1995 Australian NNS of those aged 2 years and above, and the 1997 New Zealand NNS of those aged 15 years and above. Dietary exposure was estimated for the total populations of Australia (2+ years) and New Zealand (15+ years). Estimated mean and 95th percentile dietary exposures for consumers of RMD for Australia (2+ years) were 59.2 grams per day (g/day) and 152.6g/day respectively. Estimated mean and 95th percentile exposures for New Zealand (15+ years) consumers of RMD were 38.5g/day and 129.9g/day respectively. Both the Australian and New Zealand mean results are below 60g RMD/day, the highest dose tested; however the results for the 95th percentile exceed this level for both countries. Bolus doses of RMD based on high consumers of individual foods do not exceed 16 grams for any food for either the Australian or New Zealand populations. This is less than the maximum bolus dose identified in the safety assessment (Attachment 4) of 60 g. Background RMD has been categorised by the Applicant as starch hydrolysates (e.g. dextrin and maltodextrin) that contain indigestible components. RMD can be used in a variety of foods, at varying concentrations that are currently formulated with maltodextrin. The Applicant has requested an amendment to Standard 1.2.8- Nutrition Information Requirements. Standard 1.2.8 defines dietary fibre and prescribes methods of analysis to determine both the total dietary fibre and specifically named fibre content of food. The Applicant has provided a list of possible foods in which RMD may be used, including general processed foods, beverages, cultured dairy products, cereals, frozen dairy desserts, confectionery, snack foods, baked goods, processed meats, dry mixes, high intensity sweeteners, nutritional/functional foods and dietary supplements (both food and therapeutic). Potential use levels of RMD in these foods were provided as ranges. To estimate a worst-case scenario, dietary modelling was conducted with RMD present in all of the proposed foods at the maximum level of use. Dietary Exposure Assessment Provided by the Applicant As the Applicant has not provided a dietary exposure assessment, FSANZ conducted its own dietary exposure assessment to estimate potential exposure to RMD if it was added to all the proposed foods. Dietary Modelling The dietary exposure assessment was conducted using dietary modelling techniques that combine food consumption data with food chemical concentration data to estimate the exposure to the food chemical from the diet. The dietary exposure assessment was conducted using FSANZs dietary modelling computer program, DIAMOND. Dietary exposure = food chemical concentration x food consumption The exposure was estimated by combining usual patterns of food consumption, as derived from national nutrition survey (NNS) data, with proposed levels of use of RMD in foods. Dietary Survey Data DIAMOND contains dietary survey data for both Australia and New Zealand; the 1995 NNS from Australia that surveyed 13 858 people aged 2 years and above, and the 1997 New Zealand NNS that surveyed 4 636 people aged 15 years and above. Both of the NNSs used a 24-hour food recall methodology. The dietary exposure assessment was conducted for both Australian and New Zealand populations. An assessment was conducted for the whole population of Australia (2+ years) and the whole of the New Zealand population (15+ years). Additional Food Consumption Data or Other Relevant Data No further information was required or identified for the purpose of refining the dietary exposure estimates for this application Resistant Maltodextrin Concentration Levels The levels of RMD in foods that were used in the dietary modelling were the maximum levels from those provided by the Applicant. The foods and proposed levels of use provided by the applicant and the levels of RMD used in the dietary exposure assessment are shown below in Table 1. A detailed list of the foods consumed in the NNS that were assigned to each of the food groups in Table 1 is provided in Appendix 1, Table A1.1, A1.2 for Australia and New Zealand respectively. Estimating Risk Estimated dietary exposures are usually compared to a reference health standard in order to determine the potential risk to health of a population or its sub groups. However, RMD does not have an established reference health standard such as an Acceptable Daily Intake (ADI). Therefore, estimated exposures based on all proposed foods were simply reported in gram amounts per day. Bolus doses of RMD (doses of RMD consumed in one meal) of 60 grams or more can produce gastrointestinal upset including diarrhoea, cramping and bloating in some individuals (see toxicology report). Estimated exposures to RMD from high consumers of single food groups are compared to this level. How the Estimated Dietary Exposures were Calculated The DIAMOND program allows RMD concentrations to be assigned to specific food groups. All foods contained in this group are assigned the concentration of RMD shown in Table 1. Each individuals exposure to the RMD was calculated using his or her individual food records from the dietary survey. The DIAMOND program multiplies the specified concentration of RMD by the amount of food that an individual consumed from that group in order to estimate the exposure to each food. Once this has been completed for all of the foods specified to contain RMD, the total amount of RMD consumed from all foods is summed for each individual. Population statistics (mean and high percentile exposures) are then derived from the individuals ranked exposures. Where estimated dietary exposures are expressed per kilogram of body weight, each individuals total dietary exposure is divided by their own body weight, the results ranked, and population statistics derived. Percentage contributions of each food group to total estimated exposures are calculated by dividing the sum of consumers exposures from a food group by the sum of all consumers exposures from all foods, and multiplying the result by 100. Food consumption amounts for each individual take in to account where each food in a classification code is consumed alone and as an ingredient in mixed foods (for example, RMD used in bread). Assumptions in the Dietary Modelling Assumptions made in the dietary modelling include: where a permission is assigned to a food group, all foods in that group contain RMD; all the foods within the group contain RMD at the proposed levels; consumption of foods as recorded in the NNS represent current food consumption patterns; consumers always selected the products containing RMD; and the total amount of fibre in the fortified foods was RMD (i.e. habitudinal fibre content was not added to the proposed RMD). These assumptions are likely to lead to a conservative estimate of RMD dietary exposure. Table 1: Proposed levels of use of RMD Food group Food name Proposed level of use from application (grams per 100 grams)Level used in exposure assessment (grams per 100 grams)General Processed FoodsCanned fruit0-55Soup ready to eat0-55Soup mix0-3232BeveragesFruit and vegetable drinks0-1010Water based drinks0.1010Tea and coffee dry mixes0-7575Modified and flavoured milks0-1010Soy beverages0-1010Cultured Dairy ProductsCup yoghurts Sweetened0-55Yoghurt beverages0-2.52.5Sour cream and sour cream based dips0-55CerealsHot Cereal0-55Ready-to-eat (RTE), Flaked, Extruded0-55Frozen Dairy Desserts Ice-creams, Sorbets, Frozen yoghurts, Novelties, Other frozen dairy0-5 5 Frozen novelties water, soy and dairy based0-55Confectionary ProductsChocolate0-2.52.5Other confectionary0-66High Fibre Jelly Mix0-3838Prepared Jelly Desserts8-99Low joule confectionary0-1818Snack FoodsExtruded (hot and cold), baked and fried1-55Baked GoodsBread0-66Sweet yeast-leavened baked goods0-66Sweet biscuits0-12.512.5Crackers0-12.512.5Rice Crackers0-66Processed MeatsProcessed meat0-1010Sausages0-55Special Purpose FoodsFormulated meal replacement drinks prepared0-1010Formulated meal replacement mixes0-3030Formulated meal replacement biscuits and bars 0-1515Formulated supplementary drinks prepared0-1010Formulated supplementary food mixes0-3030Formulated supplementary food0-1515Special Fibre SupplementsFibre drink3-4040Fibre drink mix0-100100High Intensity Sweetener Tabletop sweeteners (intense sweetener and maltodextrin only)99 99  Limitations of the Dietary Modelling A limitation of estimating dietary exposure over a period of time associated with the dietary modelling is that only 24-hour dietary survey data is available, and this data tends to over-estimate habitual food consumption amounts for high consumers. Therefore, predicted high percentile exposures are likely to be higher than actual high percentile exposures over a lifetime. Results Estimated Dietary Exposures to RMD The estimated dietary exposures for RMD are shown in Table 2. Estimated mean dietary exposures for Australian and New Zealand consumers of RMD were 59.2g/day and 38.5g/day respectively. Estimated 95th percentile dietary exposures for consumers of RMD are 152.6g/day for Australia and 129.9g/day for New Zealand. Table 2: Estimated Dietary Intake of RMD for Australian and New Zealand Population groupExposureActual fibre intake from NNSEstimated intake from proposed RMD useMean95 %ileMean95 %ileAustralia#All (2+ years) g/day22.042.959.2152.6g/kg bw/day0.40.81.13.2New Zealand#g/day20.348.438.5129.9All (15+ years)g/kg bw/day0.30.70.51.8*95th percentile: Only 5% of consumers had exposures above this level, 95% of consumers were exposed to lower amounts. # Total number of respondents for Australia: = 13 858, New Zealand: = 4 636. Major contributing foods to total estimated dietary exposures The major foods (>5%) that contributed to the total estimated dietary exposures to RMD for Australia and New Zealand are displayed in Table 3. The major contributors to dietary exposure to RMD were soft drinks (23-27%), cordials (8-10%) and breads (5-6%). The proposed concentrations of RMD in soft drinks and cordials was not relatively high (10%), however, the consumption amounts of these foods are large therefore resulting in these foods being a major contributor. Bread also had a low proposed level of use (6%), however its use as a staple food in Australian and New Zealand diets resulted in its level of overall contribution. Table 3: Major contributors to total estimated RMD dietary exposures for Australia and New Zealand CountryAge group Major contributing foods and percent of total RMD exposuresAustraliaWhole population (2+ years) Soft drinks, cola (13%) Soft drinks, non-cola (9%) Cordials (8%) Breads (5%) Fruit Drinks (5%) Soft drinks, diet cola (5%) New ZealandWhole population (15+ years) Regular soft drinks (23%) Cordials (10%) Breads (6%) Estimated dietary exposures to RMD for single food groups The dietary exposures to RMD from individual foods were calculated in order to determine whether a consumer could exceed the bolus dose, or safe level of consumption from a single food or single eating occasion, based on the safety assessment. They were calculated by multiplying the 95th percentile food consumption amount for a food group by the specified concentration of RMD as outlined in Table 1. Due to the way DIAMOND is programmed, single eating occasion data cannot be derived. The estimated exposures are shown in Tables 4 and 5 for Australia and New Zealand respectively. These dietary exposures differ from the estimated 95th percentile dietary exposures to RMD referred to earlier in the report, in that the results in this section are for 95th percentile consumption amounts for single foods whereas the results earlier in the report refer to 95th percentile dietary exposure to RMD from consumption of a range of foods proposed to contain RMD. Where there are less than 21 consumers of a food group, no bolus dose exposures have been calculated since there are insufficient consumers to derive a statistically robust 95th percentile. Therefore, only foods or food groups for which there were more than 21 consumers were included. All estimated short-term exposures from a bolus dose are less than 16g for any population group and for any food. This exposure is less than the level of 60g, which was the maximum level tested in humans and as such, the maximum level considered safe for human consumption, based on the safety assessment. This is likely to lead to an overestimate of the bolus dose of RMD. Table 4: Estimated dietary exposure to individual foods groups at the 95th percentile (P95) level of consumption for Australia Food codeFood descriptionLevel of use (g/100g)P95 food intake per day (g)Grams RMD / day20 Soup3.5928.843.25202 Dry soup mix3235.441.1316413801Peach, Canned in Light Syrup5481.82.4116522601Pineapple, Canned, NS as to type of packing liquid5187.80.9416711901Fruit Salad, Tropical, Canned in Light Syrup5588.332.94Fruit, canned (<21 consumers)*53921.961127Coffee based mixes, beverage101581.6915.82301Beverage flavourings7520.401.53198Flavoured milk101056.9410.571133Fruit drinks10935.49.351135Fruit-flavoured drink base and cordial10253.182.531144Electrolyte drinks10127012.70114Soft drinks, flavoured mineral waters101393.713.94116Water with other additions10573.195.731971Soy-based beverage105302.651923Yoghurt, flavoured full fat54002.001924Yoghurt, flavoured, reduced fat52591.301925Yoghurt, flavoured, low fat, skim 5332.451.661926Yoghurt, flavoured, low fat, skim 5380.471.9019270601Yoghurt beverage, reduced fat, fruit2.52070.5219270701Fermented milk drink2.5650.161932Cream, sour and sour cream-based dip597.20.491935Cream, sour, reduced fat, light, extra light5131.50.661937Cream, sour, unspecified fat level5121.50.61128Breakfast Cereal, Hot Porridge Type56503.25127Breakfast Cereals, Mixed Source51800.90195Frozen milk products5312.251.561972Soy based ice confection52591.552632Water ice confection, gelato53001.302711Chocolate2.51001.50273Other confectionery61000.25Jelly (crystals anf made up)*94203.7825Snack Foods51000.50122Regular Breads, and Rolls62421.451244Fancy Breads (e.g. Focaccia with cheese, vegetables, or fruit)6179.51.08131Sweet biscuits12.583.331.04132Savoury biscuits12.571.60.9012620101Rice crackers641.20.25186Processed meat10135.721.36185Sausages, frankfurts and saveloys5234.661.173031Artificial sweetening spoon for spoon9940.403011Fortified dry beverage flavourings3017.250.52Biscuit and liquid supplements*10822.168.222913Milk based powder meal replacements30151.54.55# Total number of respondents for Australia: = 13 858. * Food groups that did not have >21 consumers, and therefore combined to more accurately estimate P95 Table 5: Estimated dietary exposure to individual foods groups at the 95th percentile (P95) level of consumption for New Zealand Food codeFood descriptionLevel of use (g/100g)P95 food intake per day (g)Grams RMD / day281Soups3.5647.452.2725310033Peach, canned, in heavy syrup, not drained5257.40.8625310039Peach, canned, in light syrup, not drained54250.6925810006Salad, fruit, fresh with canned base54741.2925810010Fruit, salad, from canned5404.340.39625810011Fruit, salad, fresh, with canned bas54742.02Canned fruit (<21 consumers)*53801.903031Hot beverages including Milo, hot chocolate7531.082.33306Cordials101234.70212.34307Soft drinks101564.515.65309Soft drinks101309.83413.10085Flavoured milks101084.6510.85094Yoghurt53001.5000092Sour cream5129.0130.650923Sour cream dips52501.25032Porridge and cooked cereals56503.25031Muesli5156.250.78033Processed bran cereals 5800.40035Single cereal; puffed, flakes or extruded5750.38036Wheat based biscuits and shredded wheat5750.38Frozen Dairy*52481.24273Lollies61200.72274Chocolate and chocolate-based confectionary2.5127.750.32Jelly (crystals and made up)*9562.245.0624Snack Foods51520.76021Regular bread and rolls62921.75023Speciality breads6293.361.76041Biscuit, sweet12.5921.15042Biscuit, savoury12.569.60.8719Sausages and processed meats10255.62.56191Sausages5243.271.223031Hot drinks includes Milo, hot chocolate7531.080.9327110011Artificial sweetener, powder (spoon for spoon)993.30.33Biscuit and liquid supplements*21230.1532.30# Total number of respondents for New Zealand: = 4 636. * Food groups that did not have >21 consumers, and therefore combined to more accurately estimate P95 Appendix to Attachment 4 Table A1.1: Proposed levels of use of RMD in foods for Australia Food group in Application Food name as per Application NNS Code and name used for exposure assessment Proposed level of use from application (grams)Level used in exposure assessment (grams)General Processed FoodsSauces/Dressings/Soups (retorted, dry)/Gravies201 Soup0-3.53.5202 Dry soup mix3232Canned goods (fruit, vegetables, meats, pasts)16122801 Pear, Canned in Light Syrup0-5516123001 Pear, Canned, NS as to type of packing liquid0-5516212401 Boysenberry, Canned in Light Syrup0-5516214901 Raspberry, Canned in Syrup0-5516215901 Strawberry, Canned in Syrup0-5516410651 Apricot, Canned in Light Syrup0-5516410751 Apricot, Canned, NS as to type packing liquid0-5516411301 Cherry, Canned in Light Syrup0-5516413801 Peach, Canned in Light Syrup0-5516413901 Peach, Canned, NS as to type of packing liquid0-5516414501 Plum, Canned in Light Syrup0-5516414601 Plum, Canned in Heavy Syrup0-5516522201 Pineapple, Canned in Light Syrup0-5516522401 Pineapple, Canned in Heavy Syrup0-5516522601 Pineapple, Canned, NS as to type of packing liquid0-5516532601 Mango, Canned in Light Syrup0-5516612801 Lychee, Canned in Light Syrup0-5516614701 Rhubarb, Canned in Light Syrup0-5516711301 Fruit Salad, Canned in Light Syrup0-5516711501 Fruit Salad, Tropical, Canned in Heavy Syrup0-5516711901 Fruit Salad, Tropical, Canned in Light Syrup0-5516712101 Fruit Salad, Canned, NS as to type & packing liquid0-5516714401 Two Fruits, Canned in Light Syrup0-5516714501 Two Fruits, Canned, NS as to type of packing liquid0-55BeveragesTea & Coffee1127 Coffee based mixes, beverage0-7575301 Beverage flavourings0-7575Dairy198 Flavoured milk0.1010Fruit Drinks1133 Fruit drinks0-10101135 Fruit-flavoured drink base and cordial0-1010Water Based Drinks1144 Electrolyte drinks0-1010114 Soft drinks, flavoured mineral waters0-1010116 Water with other additions0-1010Soy formulated smoothies1971 Soy-based beverage0-1010Cultured Dairy ProductsCup yoghurts Sweetened1923 Yoghurt, flavoured full fat0-551924 Yoghurt, flavoured, reduced fat0-551925 Yoghurt, flavoured, low fat, skim 0-551926 Yoghurt, flavoured, low fat, skim 0-55Yoghurt drinks, Cultured dairy beverages19270601 Yoghurt beverage, reduced fat, fruit0-2.52.519270701 Fermented milk drink0-2.52.5Pro-biotic products, sour cream1932 Cream, sour and sour cream-based dip0-551935 Cream, sour, reduced fat, light, extra light0-551937 Cream, sour, unspecified fat level0-55CerealsHot Cereal128 Breakfast Cereal, Hot Porridge Type0-55Ready-to-eat (RTE), Flaked, Extruded127 Breakfast Cereals, Mixed Source0-55Frozen Dairy Desserts Ice-creams, Sorbets, Frozen yoghurts, Novelties, Other frozen dairy195 Frozen milk products 0-5 5 Frozen Soy Products1972 Soy based ice confection0-55Frozen Water Products2632 Water ice confection, gelato0-55Confectionary ProductsChocolate2711 Chocolate0-2.52.5Hard and soft candies273 Other confectionery0-66High Fibre Jelly Mix26310101 Jelly crystals, all flavours0-383826310201 Jelly crystals, all flavours, artificially sweetened0-3838Prepared Jelly Desserts26310301 Jelly, made up, regular, all flavours8-9926310401 Jelly, made up, artificially sweetened8-99Snack FoodsExtruded (hot and cold), baked and fried25 Snack Foods1-55Baked GoodsYeast and chemically leavened bread122 Regular Breads, and Rolls0-661244 Fancy Breads (e.g. Focaccia with cheese, vegetables, or fruit)0-66Sweet biscuits131 Sweet biscuits0-12.512.5Crackers132 Savoury biscuits0-12.512.5Rice Crackers12620101 Rice crackers0-66Processed MeatsGround meats, Coarse ground products186 Processed meat0-1010Emulsion type products, injected or recombined whole muscle foods185 Sausages, frankfurts and saveloys 0-5 5 High Intensity Sweetener Tabletop sweeteners (intense sweetener and maltodextrin only)3031 Artificial sweetening spoon for spoon 99 99 Dietary Supplements (both food and therapeutic types)Dry Mixes 3011 Fortified dry beverage flavourings 1-30 30 Prepared meals, bars, Snacks, Tablets, Capsules 2911 Biscuit and bar meal replacement0-1515Fluid beverages2912 Milk-based liquid meal replacements0-10102913 Milk based powder meal replacements0-30302914 Oral supplement liquids0-101019121001 Supplemented milk drink, fluid, whole fat0-101019140501 Supplemented milk drink, fluid, low fat0-1010 Table A1.2: Proposed levels of use of RMD in foods for New Zealand Food group in application Food name as per application NNS Code and name used for exposure assessmentProposed level of use from application (grams)Level used in exposure assessment (grams)General Processed FoodsSauces/Dressings/Soups (retorted, dry)/Gravies281 Soups0-3.53.5Canned goods (fruit, vegetables, meats, pasts)25110014 Apple, canned, ns as to packing liquid0-5525120015 Pear, canned, in light syrup, drained0-5525120017 Pear, canned, ns as to packing liquid0-5525120018 Pear, canned, ns as to packing liquid0-5525210008 Boysenberry, canned, ns as to drained0-5525210012 Raspberry, canned, not drained0-5525310007 Apricot, canned, in light syrup, not drained0-5525310009 Apricot, canned, in heavy syrup, not drained0-5525310011 Apricot, canned, ns as to packing liquid0-5525310018 Apricot, canned, ns as to packing liquid0-5525310033 Peach, canned, in heavy syrup, not drained0-5525310036 Peach, canned, ns as to packing liquid0-5525310037 Peach, canned, ns as to packing liquid0-5525310039 Peach, canned, in light syrup, not drained0-5525310048 Plum, canned, ns as to packing liquid0-5525310060 Peach, canned, in light syrup, ns as0-5525520008 Pineapple, canned, in light syrup0-5525520010 Pineapple, canned, in heavy syrup0-5525520012 Pineapple, canned, ns as to packing liquid 0-5525520013 Pineapple, canned, ns as to packing liquid0-5525530004 Lychee, canned, not drained0-5525530007 Mango, canned, in syrup, not drained0-5525530023 Guava, canned, syrup, not drained0-5525710009 Prune, canned, ns as to drained0-5525810002 Fruit, canned, nfs0-5525810006 Salad, fruit, fresh with canned base0-5525810007 Salad, fruit, ns as to fresh or canned0-5525810010 Fruit, salad, from canned0-5525810011 Fruit, salad, fresh, with canned bas0-55Beverages Juice, Fortified water, Sports drinks, Other beverages3031 Hot beverages including Milo, hot chocolate 0-75 75 306 Cordials0-1010307 Soft drinks0-1010309 Soft drinks0-1010Dairy085 Flavoured milks0-1010Cultured Dairy Products Cup yoghurts, Yoghurt drinks, Cultured dairy beverages094 Yoghurt 0-5 5 Pro-biotic products, sour cream092 Sour cream0-550923 Sour cream dips0-55CerealsHot Cereal032 Porridge and cooked cereals0-55Ready-to-eat (RTE), Flaked, Extruded031 Muesli0-55033 Processed bran cereals 0-55035 Single cereal; puffed, flakes or extruded0-55036 Wheat based biscuits and shredded wheat0-55Frozen Dairy Desserts Ice-creams, Sorbets, Frozen yoghurts, Novelties, Other frozen dairy093 Ice cream 0-5 5 Frozen yoghurts0934 Frozen yoghurts, all types0-55095 Other dairy products, frozen0-55Confectionary ProductsHard and soft candies273 Lollies0-66Chocolate, Coatings, Compounded flavourings274 Chocolate and chocolate-based confectionary0-2.52.527810001 Jelly, crystals, regular0-383827810002 Jelly, crystals, artificially sweetened0-383827810003 Jelly, made up, regular, plain0-9927810004 Jelly, made up, regular, fruit added0-9927810005 Jelly, made up, artificial sweet, plain0-9927811007 Jelly, made up, ns to sweetener, plain0-99Snack FoodsExtruded (hot and cold), baked and fried24 Snack Foods0-55Baked GoodsYeast and chemically leavened bread021 Regular bread and rolls0-66023 Speciality breads0-66Sweet biscuits041 Biscuit, sweet0-12.512.5Crackers042 Biscuit, savoury0-12.512.5Processed MeatsGround meats, Coarse ground products,19 Sausages and processed meats0-1010emulsion type products, injected or recombined whole muscle foods191 Sausages0-5 5 Dry MixesBeverages, Baked goods3031 Hot drinks includes Milo, hot chocolate1-3030High Intensity Sweetener Tabletop sweeteners (intense sweetener and maltodextrin only)27110011 Artificial sweetener, powder (spoon for spoon) 99 99 Dietary Supplements (both food and therapeutic types)Bars 3221 Meal replacement bars 0-15 15 Drinks3222 Meal replacement drinks0-1010 Attachment 6 Application A491 Resistant Maltodextrin as Dietary Fibre Summary of Submissions List of Submitters A public consultation period was made available from the 13 August 2003 to 3 October 2003 for the Initial Assessment of Application A491. During this period, seven separate submissions were received by FSANZ. A list of the submitters that provided comment on the Initial Assessment Report is provided below. SubmitterAbbreviationAustralian Consumers AssociationACAAustralian Food and Grocery CouncilAFGCProf. Dennis T. GordonDietitians Association of AustraliaDAAFood Technology Association of VictoriaFTAVNew Zealand Food Safety AuthorityNZFSAQueensland HealthQH Comments Made on the draft assessment for Application A491 Resistant Maltodextrin as Dietary Fibre Preferred Regulatory Option OptionSubmitters Supporting OptionComments1 Maintain Status QuoACA, DAAThe ACA does not support the inclusion of RMD in the Food Standards Code (the Code) unless sufficient evidence is provided to demonstrate that RMD carries the same health benefits of other types of dietary fibre. DAA supports Option 1 until further information is provided to suggest otherwise. 2 Regulation by a discreet standard in the FSCAFGC, Prof. Gordon, FTAV.The AFGC supports Option 2, contingent on the outcomes of a safety assessment. It is stated that nutritional and dietary considerations indicate a net benefit, as does the costs and benefits analysis. Prof. Gordon mentioned that the method should be included in the Table to subclause 18(1) of Standard 1.2.8. The FTAV Technical Subcommittee agrees with Option 2.  The Position of Other Submitters on Proposed Regulatory Options: The NZFSA made no comment on the regulatory options. QH did not take a position on the regulatory options at the Initial Assessment stage of A491, and awaits the results of a safety assessment before doing so. Definition of Dietary Fibre IssueCommentsWhether RMD meets the definition of dietary fibreThe ACA mentioned that RMD should not be included in the Code under the definition of a dietary fibre, as this would be misleading to consumers. Prof. Gordon stated that the American Association of Cereal Chemists definition of dietary fibre (which forms the basis of the dietary fibre definition in Code) was designed to include food ingredients such as RMD, polydextrose, low molecular weight fructans, FOS and GOS. The AFGC states that, in the absence of information to the contrary, the information presented at Initial Assessment supports RMD being considered as dietary fibre. The manner in which RMD does or does not comply with the definition of dietary fibreThe ACA views RMD as a substance with a structure radically different to starch, having been derived from a process of chemical alteration. It is not a synthetic analogue of any naturally occurring plant fraction [as required in the definition for dietary fibre]. Prof. Gordon mentioned that RMD is a safe non-digestible food-based carbohydrate used as a source of dietary fibre in food. RMD are not intended to be the sole source of fibre in the diet. They are intended to complement other types of dietary fibre to help individuals achieve the level of dietary fibre intake associated with better health and prevention of disease. Approximately 50% of RMD in a food can be recovered by the current methods for analysing total dietary fibre. This alone already qualifies half of the RMD in a food as dietary fibre. The AFGC was of the view that RMD satisfy: part a) of the definition for dietary fibre as the IAR cited an in vivo study demonstrating the indigestibility of RMD in the human body, and mentions that RMD meets the AOAC definition of dietary fibre. part b) the definition on the basis of the IAR statement that there appears to be enough evidence indicating that RMD promotes all three physiological effects. the final line of the definition as the United States (US) Institute of Medicine has categorised RMD as types of oligosaccharides and polysaccharides. DAA stated that further information is required before any determination is made as to whether RMD complies with the definition of dietary fibre. Physiological Effects Criteria Prof. Gordon mentioned that it would be appropriate to develop criteria for the physiological effects listed in the definition of dietary fibre. However, in considering such an undertaking, it should be noted that there are no acceptable procedures or protocols from other regulatory agencies (e.g. USFDA or Health Canada) that measure the beneficial effects of any dietary fibre in humans. An analytical method to measure the source of dietary fibre components, safety information, and a compilation of animal and human studies demonstrating the physiological effects, should be sufficient in the absence of accepted criteria. There are various experiments that support RMD as promoting all of the physiological effects at a moderate level when compared to other known dietary fibres, however there are few foods or sources of dietary fibre that can accomplish all three effects. The request to have RMD recognised as a source of dietary fibre should not be based solely on nutrition and/or health promoting properties. DAA stated that there was insufficient information at Initial Assessment to determine the physiological effects of RMD.  Method of Analysis IssueCommentsThe suitability of AOAC Official Method 2001.03Prof. Gordon made the following statements on the AOAC Official Method of Analysis 2001.03: The method measures what it is purported to measure; The method can apply to foods not containing RMD; and The method was designed to recover all soluble components not recovered by the method for total dietary fibre [AOAC 985.29]. The AFGC supports the inclusion of AOAC 2001.03 in the Table to subclause 18(1). AOAC 2001.03 measures what it is purported to measure. The method can act as an alternative to the other two methods for assessing total dietary fibre, and can thus apply to foods not containing RMD. FSANZ will need to seek advice from enforcement agencies on the implications of including AOAC 2001.03 as a simple alternative method to the other two methods for total dietary fibre. A sample may need to be analysed by all three methods to ensure that a legal challenge could not claim that one of the other methods were more appropriate. The cost to industry from using the new methodProf. Gordon indicated that AOAC 2001.03 is slightly more expensive and time consuming compared to the method for total dietary fibre, but is more exacting and accurate. This method could also be used to measure other soluble indigestible carbohydrates that escape current methods of analysis with time and patience. The AFGC indicated that AOAC 2001.03 would be more expensive to carry out than AOAC 985.29 due to the additional procedures. Therefore industry is likely to use it only where RMD is present in the food and the optimum dietary fibre value is needed for claiming or for nutrition information purposes.  Safety of Resistant Maltodextrin IssueCommentsConducting a Safety AssessmentThe NZFSA agrees that further work is required to assess the safety of RMD. The AFGC supports the undertaking of a safety assessment, as it is consistent with the Section 10 objectives of the Food Standards Australia New Zealand Act 1991. Safety IssuesQH views the safety concerns for RMD to be: the altered chemical structure of the product compared to traditional maltodextrin, the potential for high levels of consumption of the product, and the physiological effects of a poorly digested fibre on the gastrointestinal tract. Prof. Gordon mentioned that he has no knowledge or experience of how RMD affects gut morphology or nutrient absorption, but does for other types of dietary fibre. It was stated that no other dietary fibre causes problems in these areas of physiology except for chitosan. There is no evidence in the literature of RMD harming the intestine or adversely affecting nutrient bioavailability. Prof. Gordon has data that indicates dietary fibre does not interfere with nutrient absorption (but not on every food or source of indigestible carbohydrate / RMD). Safety concerns for RMD are the same as for other types of dietary fibre flatulence and diarrhoea. The amount of RMD that is necessary to produce these effects are in excess of 1g/kg body weight consumed at one time, which is an unlikely scenario. Prof. Gordon foresees no physiological problems or discomfort for individuals consuming RMD in the amounts listed in Table 1 of the IAR. DAA stated that if RMD is allowed in the variety of foods listed in Table 1 of the Initial Assessment Report, there is potential for excessive intakes to occur. Upon evaluation of the safety, the following may be necessary: advisory or warning statements, restrictions on maximum amounts of RMD, consideration of the impact on children and adolescent dietary and nutrient intakes, and consideration of the impact on those with inflammatory bowel disease.Assessment of safety by overseas jurisdictionsThe NZFSA requested that FSANZ checks on the regulatory status of RMD in overseas jurisdictions, to ensure that the statement made in the IAR of having overseas approval is correct. The AFGC does not believe FSANZ will find RMD unsafe when other overseas jurisdictions have not reached this conclusion. Another safety consideration is that RMD complies with the specifications of identity for maltodextrin in the Food Chemical Codex. Nutritional and Dietary Issues IssueCommentsImpact of RMD on nutrientsACA - the Applicant promotes RMD as a form of soluble fibre that is functionally equivalent to pectin and other gums, but without the disadvantage of forming gels or very viscous solutions. Only one reference was provided to support these claims and ACAs own research has not identified further supporting evidence. Prof. Gordon - Other ingredients in plant foods may impair nutrient absorption, but not dietary fibre itself; e.g. phytic acid and oxalic acid. Therefore, other sources of dietary fibre such as RMD could help increase dietary fibre intakes while diluting the levels of more deleterious components. The AFGC has supplied evidence that magnesium absorption was enhanced through the consumption of fermentable oligo- or poly-saccharides by humans.Impact on population nutritionQH would like the Draft Assessment Report to address the concern that A491 may further shift food consumption away from fresh foods to more processed foods. Rather than aiding public health benefits by reducing chronic diseases, such a shift may do the opposite by reducing the consumption of fresh fruit and vegetables. Prof. Gordon stated that there should be an encouragement to consume more fruit and vegetables in the diet, however there are nutritional and health values in processed foods that contain indigestible carbohydrates such as RMD. States that processed foods may be sacrilegious to many nutritionists, but they provide convenience and nutrition, and are what many people eat. RMD is not a single source of dietary fibre, but rather part of a large dietary matrix of indigestible carbohydrates that help achieve the human dietary needs for this nutrient. AFGC - on the basis of the information provided in the IAR, the AFGC considers that RMD will have minimal, if any negative nutritional impacts, and if displaces other forms of dietary fibre contain substances such as phytates and oxalates, then it may have a positive nutritional benefit. An increase in dietary fibre consumption as the result of increased RMD use by industry would be consistent with the Dietary Guidelines. It is clear that the concept of dietary fibre is evolving, and that there is no reason why that [concept] of consumers should not evolve in the same way. It is mentioned that the following should not be overestimated with RMD: * The potential for foods to contain higher levels of dietary fibre, with the potential for this increase to extend to non-traditional dietary fibre sources, and * The impact on nutrition education by expanding the concept of dietary fibre. DAA is concerned that fibre supplements, such as RMD, may result in the substitution of fibre-rich foods such as fruit, vegetables and wholegrains. Fibre supplements lack other beneficial components such as plant chemicals and antioxidants. Consumer Issues IssueCommentsConsumers understanding of dietary fibreThe ACA indicated that consumers look for dietary fibre with the expectation that it will provide scientifically proven health benefits. A large body of evidence supports these heath benefits. QH mentioned that consumer confusion on dietary fibre additions cannot be underestimated, and represents a significant cost to governments and providers of nutrition education. Consumers already struggle to understand basic nutrition. Prof. Gordon commented that consumer information should be updated on a regular basis to relay the importance of dietary fibre for good health, the importance of fruit vegetables and cereals/grains as sources of dietary fibre, and that processed foods are a safe and nutritious source of dietary fibre. Novel Food Status IssueCommentsAssessment of the novel food status of RMDThe NZFSA is not convinced that RMD should be excluded from the novel standards process. As RMD cannot be declared as dietary fibre in the domestic market, it is doubtful that it is currently used in the food supply. RMD could therefore meet the definition of a novel food.  PAGE 66  PAGE 1 INITIAL ASSESSMENT DRAFT ASSESSMENT FINAL ASSESSMENT MINISTERIAL COUNCIL Public Consultation Public Consultation Comment on scope, possible options and direction of regulatory framework Provide information and answer questions raised in Initial Assessment report Identify other groups or individuals who might be affected and how whether financially or in some other way Comment on scientific risk assessment; proposed regulatory decision and justification and wording of draft standard Comment on costs and benefits and assessment of regulatory impacts An IA report is prepared with an outline of issues and possible options; affected parties are identified and questions for stakeholders are included Applications accepted by FSANZ Board IA Report released for public comment Public submissions collated and analysed A Draft Assessment (DA) report is prepared using information provided by the applicant, stakeholders and other sources A scientific risk assessment is prepared as well as other scientific studies completed using the best scientific evidence available Risk analysis is completed and a risk management plan is developed together with a communication plan Impact analysis is used to identify costs and benefits to all affected groups An appropriate regulatory response is identified and if necessary a draft food standard is prepared A WTO notification is prepared if necessary DA Report considered by FSANZ Board DA Report released for public comment Comments received on DA report are analysed and amendments made to the report and the draft regulations as required The FSANZ Board approves or rejects the Final Assessment report The Ministerial Council is notified within 14 days of the decision Those who have provided submissions are notified of the Boards decision If the Ministerial Council does not ask FSANZ to review a draft standard, it is gazetted and automatically becomes law in Australia and New Zealand The Ministerial Council can ask FSANZ to review the draft standard up to two times After a second review, the Ministerial Council can revoke the draft standard. 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