Methods of normalizing amino acid metabolism in subjects on restricted protein diets and supplemental amino acids, using specially formulated amino acids that mimic the absorption and metabolism of naturally occurring proteins, are described.本發明係描述在限制蛋白質飲食與補充胺基酸之受試者中正常化胺基酸代謝的方法,其使用特殊配製之胺基酸,模擬天然存在之蛋白質的吸收與代謝。