The stronger ability of the FRFs to bind glucose might be beneficial to lower the concentration of available glucose in the small intestine. The insoluble FRFs were also found to exhibit a significantly stronger effect in reducing the aamylase activity (21.8–27.9%) than cellulose (7.29%). This in-vitro study indicated that the FRFs could retard the glucose production rate (mmol/h) more efficiently than cellulose. Findings from Gourgue et al. (1992) and Ou et al. (2001) demonstrated that dietary fibres could retard a-amylase activity by capsulating starch and
enzyme, and even inhibiting the enzyme. All these results imply that the apparent effects, on glucose-adsorption and
amylase inhibition, of the FRFs might create a concerted function in decreasing the absorption rate of glucose and
the concentration of postprandial serum glucose.