Abstract
Recently we developed a low-viscosity water-soluble dietary fiber, indigestible dextrin (PF-C), obtained by heating and enzyme treatment of potato starch. In this study we conducted an oral sugar tolerance test in rats in order to evaluate the effects of PF-C on blood glucose and insulin flattening after administration of various sugars. The results are summarized as follows: 1) The increase in blood glucose levels after sucrose and maltose (1.5g/kg body weight) loading was reduced by PF-C (0.15g/kg body weight). Insulin release after sucrose, maltose or maltodextrin loading was decreased by PF-C. 2) PF-C did not inhibit sucrase and maltase activities in rat intestinal mucosa cell homogenate. 3) To evaluate the effect of PF-C on glucose, sucrose and maltose absorption, an experiment was performed using the intestinal perfusion technique in situ. PF-C had no effect on glucose absorption, but decreased the absorption of hydrolyzed glucose derived from sucrose and maltose, with no change in the hydrolysis of the latter disaccharides.
