Hudson C A, Betschart A A, Turnlund J R, Kretsch M J, Sauberlich H E
Western Regional Research Center, US Department of Agriculture, Albany, CA 94710.
Am J Clin Nutr. 1989 Apr;49(4):636-40. doi: 10.1093/ajcn/49.4.636.
Eight young women consumed a vitamin B-6 depletion diet (egg albumen formula, less than 0.05 mg vitamin B-6/d) for 11-28 d. Subjects (n = 4) then consumed either animal protein (AP, mainly dairy and poultry products) or plant protein (PP, mainly various types of beans) diets with increasing vitamin B-6 intake (0.5, 1.0, 1.5, and 2.0 mg/d) for periods of 14-21 d. All diets provided 1.55 g protein/kg body wt. Apparent protein digestibility of AP (94.6%) was significantly higher than that of PP (88.4%) diets (p less than 0.001). Protein digestibility was not significantly affected by vitamin B-6 intake. Apparent nitrogen balance of subjects consuming AP diets was slightly, though not significantly, higher than that of subjects fed PP diets. N balance was not influenced by vitamin B-6 intake. Data suggest that short-term low vitamin B-6 intake does not affect protein utilization in humans as determined by digestibility and N balance.
八名年轻女性食用了11至28天的维生素B-6缺乏饮食（蛋清配方，维生素B-6摄入量低于0.05毫克/天）。然后，受试者（n = 4）食用动物蛋白（AP，主要是乳制品和家禽产品）或植物蛋白（PP，主要是各种豆类）饮食，维生素B-6摄入量逐渐增加（0.5、1.0、1.5和2.0毫克/天），持续14至21天。所有饮食均提供1.55克蛋白质/千克体重。AP饮食的表观蛋白质消化率（94.6%）显著高于PP饮食（88.4%）（p < 0.001）。蛋白质消化率不受维生素B-6摄入量的显著影响。食用AP饮食的受试者的表观氮平衡略高于食用PP饮食的受试者，但差异不显著。氮平衡不受维生素B-6摄入量的影响。数据表明，短期低维生素B-6摄入量不会影响人类通过消化率和氮平衡确定的蛋白质利用率。
