Problems in the prediction of protein values of diets

Abstract

Platt & Miller (1958) have pointed out that the net protein utilization (N.P.u.) of whole diets depends not only on the amino-acid composition of the proteins they contain but also on a number of other factors, the more important of which are: (I) the protein-calorie ratio of the diet, (2) the adequacy of the calorie intake and (3) the level in the diet of some vitamins and minerals.