The Amino Acid Composition and the Nutritive Value of Proteins

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Abstract
Male weanling rats of the Sprague-Dawley strain were used in growth studies on protein and amino acid rations, and the effects of fat content and the type of carbohydrate were studied. An amino acid diet containing 50% of fat resulted in growth failure and a diseased appearance not curable by extra oral supplementation with B-vitamins. An amino acid diet providing the minimum requirements of the essential amino acids plus non-essential amino acids and fed at a 10% protein level (N × 6.25) was found to promote a growth rate of 4.4 gm per day when fed ad libitum.