ILEAL RECOVERY OF STARCH FROM WHOLE DIETS CONTAINING RESISTANT STARCH MEASURED IN-VITRO AND FERMENTATION OF ILEAL EFFLUENT

被引:131
作者
SILVESTER, KR
ENGLYST, HN
CUMMINGS, JH
机构
[1] Medical Research Council, Dunn Clinical Nutrition Centre, Cambridge
[2] MRC, Dunn Clinical Nutrition Centre, Cambridge, CB2 2DH, Hills Rd
关键词
RESISTANT STARCH; DIETARY CARBOHYDRATE; DIGESTION; INTESTINAL ABSORPTION; ILEOSTOMY; ILEUM; SHORT-CHAIN FATTY ACIDS; BUTYRATE; AMMONIA; FERMENTATION;
D O I
10.1093/ajcn/62.2.403
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Six subjects with ileostomies consumed five diets containing 61-164 g starch/d of which 0.4-34.8 g was resistant starch (RS). Ileal excretion of starch was 97% of that measured as dietary RS in vitro with no significant difference between RS fed and starch recovered on any of the test diets. Variation in starch excretion between subjects was partly due to differences in mouth-to-stoma transit time. In vitro fermentation of ileal effluent from RS-supplemented diets produced significantly more short-chain fatty acids, a higher molar proportion of butyrate (17% compared with 12%), and a lower concentration of ammonia compared with control subjects. These results indicate that the amount of starch that reaches the large intestine can be predicted from measurements in vitro for a wide range of RS intakes under normal eating conditions. They also support the hypothesis that RS, through fermentation, has distinctive influences on the colonic environment.
引用
收藏
页码:403 / 411
页数:9
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