Miyoshi H, Okuda T, Okuda K, Koishi H
Department of Food and Nutrition, Faculity of the Science of Living, Osaka City University, Japan.
J Nutr Sci Vitaminol (Tokyo). 1987 Jun;33(3):207-18. doi: 10.3177/jnsv.33.207.
The effect of brown rice with low protein intake was studied in five healthy young men. Feces were weighed, the digestibility of nutrients was determined, and blood tests were made. Each subject followed a diet consisting mainly of polished rice for 14 days and one consisting mainly of brown rice for 8 days. Both diets contained 0.5 g protein per kg of body weight. The brown rice diet had 3 times as much dietary fiber as the polished rice diet. On the brown rice diet, fecal weight increased, and apparent digestibility of energy, protein, and fat decreased, as did the absorption rates of Na, K, and P. The nitrogen balance was negative on both diets, but more negative on the brown rice diet. The phosphorus balance on the brown rice diet was significantly negative, but other minerals were not affected by the diet. The levels of cholesterol and minerals in the plasma were not significantly different on the polished rice diet and the brown rice diet. Comparing these results with data on standard protein intake (Miyoshi, H. et al (1986) J. Nutr. Sci. Vitaminol., 32, 581-589.), we concluded that brown rice reduced protein digestibility and nitrogen balance.
对五名健康年轻男性进行了低蛋白摄入的糙米效果研究。对粪便进行称重，测定营养物质的消化率，并进行血液检测。每位受试者先遵循主要由精米组成的饮食14天，然后遵循主要由糙米组成的饮食8天。两种饮食每千克体重均含有0.5克蛋白质。糙米饮食中的膳食纤维含量是精米饮食的3倍。食用糙米饮食时，粪便重量增加，能量、蛋白质和脂肪的表观消化率降低，钠、钾和磷的吸收率也降低。两种饮食的氮平衡均为负，但糙米饮食的负平衡更明显。糙米饮食的磷平衡显著为负，但其他矿物质不受饮食影响。精米饮食和糙米饮食时血浆中的胆固醇和矿物质水平无显著差异。将这些结果与标准蛋白质摄入量的数据（Miyoshi, H.等人（1986年）《营养学与维生素学杂志》，32卷，581 - 589页）进行比较后，我们得出结论，糙米降低了蛋白质消化率和氮平衡。
