Relation between Vitamin B and Protein in the Diet of Growing Rats

Abstract

A diet consisting largely of protein (caseinogen) may be inadequate for the growth requirement of young rats but the inadequacy may be made good by raising the proportion of yeast extract (vitamin B). Normal rates of growth were obtained on a diet in which the proportion of protein and yeast had a value of 5 or under. Vitamin B apparently bears a quantitative relationship to the amount of protein in the diet, but apparently not to carbohydrates, nor to the total calories consumed. Excretion of large quantities of nitrogenous end-products of metabolism does not cause damage to the Kidneys.