Variation in fasting and postprandial amino acids of men fed adequate or protein-free diets.

نویسندگان

  • L A Weller
  • S Margen
  • D H Calloway
چکیده

R APID, RELIABLE, and sensitive criteria of protein-nutrition status are essential to diagnosis of subclinical deficiency. Several investigators have suggested that the amount or pattern, or both, of free amino acids in plasma is one such index. Generally, essential amino acids (EAA) are found to be reduced and the nonessential ones (NEAA) to be elevated in plasma of children suffering from protein-deficiency disease (1-6). Similar alterations have been recorded in men experimentally deprived of protein (7-9). However, some workers have not found amino acid ratios to be fully reliable indicators of clinical status (10). Evaluations based on field samples are complicated by the fact that plasma amino acid levels are not constant throughout the day (11-12). Concentrations also vary widely within and between individuals ingesting self-selected uncontrolled diets (8, 13). This report presents fasting and postprandial serum amino acid patterns of healthy men fed precise formula diets containing either an adequate amount or no protein. There is large intraand interindividual variation not ascribable to limited duration of constant feeding of either diet, as well as expected variation

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عنوان ژورنال:
  • The American journal of clinical nutrition

دوره 22 12  شماره 

صفحات  -

تاریخ انتشار 1969