Nitrogen Balance Studies with Subjects Fed the Essential Amino Acids in Plasma Pattern Proportions

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Abstract
Two young women and two young men were fed the essential amino acids proportioned to plasma pattern during one period and an isonitrogenous amount of essential amino acids proportioned to egg pattern during another period in diets that contained 10 gm of total nitrogen/day. Nitrogen balance values showed that less nitrogen was retained when the amino acids were administered in plasma pattern ratios. This observation is evidence that amino acids supplied as the plasma pattern are utilized less effectively for metabolic purposes than amino acids in egg pattern proportions.