<P> Some types of resistant starch (RS1, RS2 and RS3) are fermented by the large intestinal microbiota, conferring benefits to human health through the production of short - chain fatty acids, increased bacterial mass, and promotion of butyrate - producing bacteria . </P> <P> Resistant starch in various ways has similar physiologic effect as dietary fiber, which is why it functions as a mild laxative and why consuming it at high doses can lead to flatulence . </P> <P> The concept of resistant starch arose from research in the 1970s and is currently considered to be one of three starch types: rapidly digested starch, slowly digested starch and resistant starch, each of which may affect levels of blood glucose . </P> <P> The Commission of the European Communities has supported research eventually leading to a definition of resistant starch . </P>

Why resistant starch is classified as dietary fibre