The Study of the Protein in a Commercial Meat Product

In nutrition studies it is often desirable to conduct experiments designed to determine wherein one factor of a constituent of the diet is deficient. The method of determining such deficiencies is known as a biological analysis of a food-stuff and has been successfully used by many investigators. A detailed description of this method is given by McCollum (1). In this paper we desire to present the results of biological tests in determining the amino acid deficiencies of a certain commercial protein concentrate. EXPERIMENTAL Newly hatched White Leghorn chicks, of similar breeding and from flocks kept under uniform conditions, were used in these tests, using 18 chicks to each four lots. The chicks were confined in tables previously described (2). Each chick was banded and weekly weights were taken. A record was kept of the weekly food consumption. The meat meal product used in this test is described by the manufacturers . . .