蛋白质和氨基酸参考摄入量的研究进展

Advances on the level of reference nutrient intake of protein and amino acid

世界粮农组织在1957年提出成年人蛋白质的需要量是0．66g／（kg·d），1985年FAO／WHO／UNU在氮平衡实验的基础上提出了成年人蛋白质的推荐供给量是0．75g／（kg·d），并给出的不同年龄段蛋白质和氨基酸的参考摄入量，这些数值在世界范围内为人们所广泛接受。但也有不同的意见，美国、英国等国的一些专家采用相同的方法所得出的蛋白质和氨基酸的需要量在婴儿和儿童这一年龄段要低于1985年FAO／WHO／UNU的数值，而同样应用氮平衡法得出的成年人氨基酸的需要量要高于1985年FAO／WHO／UNU的数值。Young等应用稳定同位素标记必需氨基酸的方法所测定的成年人氨基酸的生理需要量更是要远远高于1985年FAO／WHO／UNU的数值，大约达到2～3倍这一水平。

The value of requirement of protein in adult is 0.66g/（kg· d）, as is suggested by FAO in 1957. Through the detail discusses repeated by many experts in the world, FAO/WHO/UNU suggested that RNI of protein and amino acid was different for different age groups, based on nitrogen balance method and factorial method. But there were opposited opinions, based on the same methods, the values that some research groups in America and England got were different from that of FAO/WHO/UNU. The requirements of specific indispensable amino acid that Vernon. R. Young had got by using the stable isotope technique were 2 - 3 times higher than that of FAO/WHO/UNU.