PROTEIN REQUIREMENT OF YOUNG-ADULT NIGERIAN FEMALES ON HABITUAL NIGERIAN DIET AT THE USUAL LEVEL OF ENERGY-INTAKE
PROTEIN REQUIREMENT OF YOUNG-ADULT NIGERIAN FEMALES ON HABITUAL NIGERIAN DIET AT THE USUAL LEVEL OF ENERGY-INTAKE
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DOI：
10.1079/bjn19930138
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发表时间：
1993-09-01
影响因子：
3.6
通讯作者：
ATINMO, T
中科院分区：
文献类型：
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作者：
EGUN, GN;ATINMO, T
对12名21-32岁健康成年女性进行了短期氮平衡研究，以确定她们的蛋白质需要量。日粮蛋白质水平分别为0.3、0.4、0.5和0.6g蛋白质/kg/d。受试者的能量摄入量保持在0.18MJ/kg/d，所有受试者在整个研究期间保持正常活动。在每个饮食期间，通过测量尿液、粪便、汗液和月经液中的氮来确定氮的排泄量。4个蛋白质水平下的氮平衡分别为-15.15(SD 5.95)、-5.53(SD 6.71)、+6.15(SD 4.76)和+12.05(SD 8.63)mg N/kg/d，分别为0.3、0.4、0.5和0.6 g/kg/d。回归分析计算的平均氮素需要量为76.0(SD 3.37)mg N/kg/d(0.48g蛋白质/kg/d)。覆盖97.5%群体的个体变异容许量估计为95mgN/kg/d(0.6g蛋白质/kg/d)。日粮蛋白质净利用率为0.55。与一项针对男性的类似研究相比，不同性别之间的蛋白质需求量存在显著差异。因此，必须审查粮食及农业组织/世界卫生组织/联合国大学(1985年)专家协商小组建议的蛋白质津贴中不合理的性别差异。
A short-term N balance study was conducted in twelve healthy female adults aged 21-32 years to determine their protein requirement. Four dietary protein levels (0.3, 0.4, 0.5 and 0.6 g protein/kg per d) were used. Energy intake of the subjects was kept constant at 0.18 MJ/kg per d. All subjects maintained their normal activity throughout the study period. N excretion was determined from the measurements of N in a total collection of urine, faeces, sweat and menstrual fluid for each dietary period. N balance during the four protein levels were -15.15 (SD 5.95), -5.53 (SD 6.71), +6.15 (SD 4.76) and +12.05 (SD 8.63) mg N/kg per d for 0.3, 0.4, 0.5 and 0.6 g protein/kg per d respectively. The calculated average N requirements from regression analysis was 76.0 (SD 3.37) mg N/kg per d (0.48 g protein/kg per d). The estimate of allowance for individual variation to cover the 97.5% population was 95 mg N/kg per d (0.6 g protein/kg per d). The net protein utilization (NPU) of the diet was 0.55. When compared with a similar study with men, there was a significant difference in the protein requirement between sexes. Thus, the unjustifiable sex difference in the protein allowance recommended by the Food and Agriculture Organization/World Health Organization/United Nations University (1985) Expert Consultation group must be reviewed.