Resistant starches of beans reduce the serum cholesterol concentration in rats.

We examined the effects of the resistant starches of adzuki (Vigna angularis), kintoki (Phaseolus vulgaris, variety), and tebou (P. vulgaris, variety) beans on the lipid metabolism in rats. Rats were fed a cholesterol-free diet with 25 g of cornstarch (CS)/100 g diet, 25 g of adzuki starch (AS)/100 g diet, 25 g of kintoki starch (KS)/100 g diet, or 25 g of tebou starch (TS)/100 g diet for 4 wk.

Enzyme-resistant fractions of beans lowered serum cholesterol and increased sterol excretions and hepatic mRNA levels in rats.

Feeding rats beans with resistant starch reduces their serum cholesterol concentration; however, the mechanism by which this occurs is not fully understood. We examined the effects of enzyme-resistant fractions of adzuki (Vigna angularis) and tebou (Phaseolus vulgaris, var.) beans on serum cholesterol and hepatic mRNA in rats.