[Amino acid assimilability in human dietary protein deficiency].

The effect of different levels of protein in he diets (15.1 +/- 0.3; 9.4 +/- 0.2; 8 +/- 0.4; 4.6 +/- 0.3 g nitrogen a day) on assimilation of amino acids in man was studied. The rates of endogenous excretion of 18 amino acids with feces were determined in the course of protein-free nutrition. It has been shown that as the body supply with protein decrease the assimilation of most amino acids rises. It has been proved experimentally that it is not wise using the index of "seeming" assimilation in determination of amino acid assimilation.