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  • Title: Protein quality of supplements and meal replacements. Amino acids and calculated indicators of protein quality.
    Author: Marable NL, Hinners ML, Hardison NW, Kehrberg NL.
    Journal: J Am Diet Assoc; 1980 Sep; 77(3):270-6. PubMed ID: 7410755.
    Abstract:
    The amino acid composition of several types of dietary supplements and meal replacements was measured and compared with label values when available and to published values for egg. Calculated indicators of protein quality, such as chemical score, protein calorie:total calorie ratio, individual essential amino acid:total essential amino acid ratio, and total essential amino acid:total amino acid ratio were also compared for products, egg, and the estimated pattern of adult requirements. Predigested liquid protein products were notably lower in protein quality than other products. All non-predigested products compared favorably with egg in terms of protein quality, but were more expensive and had no advantages over regular meals in terms of protein quality as reducing aids or protein supplements.
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