ArticlesScientific Apparatus and Laboratory Methods

OBSERVATIONS ON THE BIOLOGICAL VALUE OF A MIXTURE OF ESSENTIAL AMINO ACIDS

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Science  24 Sep 1943:
Vol. 98, Issue 2543, pp. 286-288
DOI: 10.1126/science.98.2543.286

Abstract

(1) A mixture of "essential" amino acids, fed to rats, was found to be inferior from a nutritional point of view to enzymatic or acid casein hydrolysates or casein fed at comparable levels.

(2) Evidence is presented which suggests that the nutritive inadequacy of the essential amino-acid diet may be due in part to toxic effects of unnatural forms of certain amino acids that can not be utilized.