Optimal amino acid composition of diets for patients with chronic renal failure.

When following the spectrum of plasmatic amino acids in patients with chronic renal failure in course of a six-week treatment with low-protein diets, an increase of non-essential amino acids, glycine and alanine, was observed in the case of a diet containing 20 g of proteins. A further decrease of tyrosine and threonine, which were decreased already before the therapy, suggests the presence of an effect of the reduced intake of proteins on the levels of these amino acids. High levels of methionine occurring in the case of the diet containing 20 g of proteins a day, supplemented by methionine to a minimally necessary requirement according to Rose, show different requirements) for this amino acid in patients with the chronic renal failure. A significant drop of the histidine and arginine as compared to the values before the treatment demonstrated that it is also necessary to take into account these amino acids when composing optimal amino acid formulation for uremics. A preliminary proposal is presented of a composition of amino acid mixture suitable for patients with chronic renal failure which differs essentially from the Rose formulation developed for a healthy organism. Different requirements for arginine are also considered in addition to the essential amino acids and histidine.