PMID: 8615362May 1, 1996Paper

Resistant starch lowers fecal concentrations of ammonia and phenols in humans

The American Journal of Clinical Nutrition
A BirkettK O'Dea

Abstract

We investigated the effect of resistant starch (RS) on markers of colonic protein metabolism. Eleven subjects participated in a randomized crossover study in which they consumed either high-RS (39 +/- 3 g/d, -chi +/- SEM) or low-RS (5 +/- 0.4 g/d) diets for 3 wk. All other macronutrients were kept constant. During the high-RS diet daily excretion of fecal nitrogen increased from 1.84 +/- 0.15 to 2.86 +/- 0.42 g/d (P < 0.01) and excretion of fecal phenols fell from 9.2 +/- 1.4 to 5.3 +/- 0.8 mg/d (P < 0.01). Fecal concentrations of ammonia decreased from 397 +/- 33 to 278 +/- 49 microgram/g (P < 0.01) and phenols decreased from 69 +/- 8 to 39 +/- 10 microgram/g (P < 0.001). Daily output of urinary ammonia, urea, phenols, and total nitrogen did not change significantly, but pH decreased from 6.4 +/- 0.1 to 6.2 +/- 0.1 (P < 0.05) during the high-RS period. These results suggest that RS significantly attenuates the accumulation of potentially harmful byproducts of protein fermentation in the human colon.

Citations

Aug 25, 2001·The British Journal of Nutrition·F BrancaH Verhagen
Sep 14, 2007·Scandinavian Journal of Gastroenterology·Vicky De PreterKristin Verbeke
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Dec 17, 2011·Molecular Nutrition & Food Research·June ZhouMarc R Blackman

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