VITAMIN D MILK
THE RELATIVE VALUE OF DIFFERENT VARIETIES OF VITAMIN D MILK FOR INFANTS: A CRITICAL INTERPRETATIVE REVIEWPHILIP C. JEANS, M.D. IOWA CITYIn this presentation an attempt is made to evaluate in relation to the human infant the relative potencies of the different varieties of vitamin D1 as found commercially in vitamin D milks. Orientation in this endeavor is aided by a brief consideration of the relative values as determined for the experimental animal.
EXPERIMENTAL WORK WITH ANIMALS
The animals used chiefly are the rat and the chick. The lesser potency of irradiated ergosterol as compared to cod liver oil has been established beyond any reasonable doubt when these two materials are fed on an equal rat unit basis in experiments with the chicken. The numerical difference found depends chiefly on dietary and other variants in the experiments with chickens and has varied somewhat with different