Transition of definition and determination method of dietary fiber

Relationships between determination methods and definitions of dietary fiber were reviewed and discussed with history of analysis methods. 1) The definition accepted at the Japanese Association for dietary fiber Research, the definition of AOAC-AACC and the definition established in Europe were introduced. There are items about a physiological function in these definitions of dietary fiber. However, it is only the item of digestibility that Enzymatic-Gravimetric Method deals with the definition. It is difficult to make the physiological function in an alimentary canal reflect in assay. 2) Evaluation was carried out from the historical side of Established methods and Official methods of determination. It was discussed that what kind of DF which can be analyzed or cannot be analyzed as quantitative analysis on the basis of the feature of an analytic principle. 3) Newly Method "A Simplified Modification Method of AOAC Official Method 991.43 (Enzymatic Digestion under Constant pH) (J.AOAC Int. 90, 217-237(2007))" which was authorized by Japanese Association for Dietary Fiber Research was introduced too.