Effect of dietary fiber and tannins on protein nutritive value in the common bean (Phaseolus vulgaris).

摘要

The nutritive value of common bean (Phaseolus vulgaris) protein is typically lower than that of cereal and animal proteins. In this investigation the effects of dietary fiber and tannins in reducing common bean protein nutriture were investigated using weanling rats. Soluble dietary fiber significantly increased fecal nitrogen losses (p ;Soluble dietary fiber is largely converted to volatile fatty acids in the large intestine. Though soluble dietary fiber significantly reduces protein digestibility, the energy provided by fermentation of soluble dietary fiber in the large intestine may prevent significant reductions in NPR values. Tannins do not lower protein digestibility but may act to reduce overall protein nutriture by damaging intestinal cells and entering the blood. Tannins entering directly into the blood are highly toxic.