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Urinary Excretion of Essential Amino Acids by Human Subjects Fed Diets Containing Proteins of Different Biological Value¹

Department of Physiology and Vital Economics, University of Rochester School of Medicine and Dentistry, Rochester, New York

The urinary excretion of "free" essential amino acids by male and female human subjects was determined when the diets contained no protein or small amounts of proteins of widely different biological value. No sex differences in amino acid excretion were detected.

With the possible exceptions of histidine and threonine, the pattern of amino acid excretion was unchanged and the absolute amounts very little changed by adding various proteins to a protein-free diet.

No correlation was found between the biological value of ingested protein and the total amount of essential amino acids excreted in the urine.

Manuscript received 22 January 1951.

This article has been cited by other articles:

				G. A. GOLDSMITH, W. G. UNGLAUB, and J. GIBBENS RECENT ADVANCES IN NUTRITION AND METABOLISM: Review of the Literature, 1951 Arch Intern Med, October 1, 1952; 90(4): 513 - 561. [Abstract] [PDF]