The total content of vitamin D in human milk and cow's milk

Abstract

1. It was shown that the water-soluble fraction of cow's milk and human milk did no possess significant antirachitic activity on rats.2. Whole cow's milk was found to contain 38 i.u. vitamin D/1. Whole human milk contained 15 i.u. vitamin D/1, of which 12 i.u. derived from the lipid fraction.3. Thus the values found were much lower than the 204 i.u./1 in cow's milk and 950 i.u./1 in human milk given in the literature based on chemical determination of the sterol sulphate content.