Paul Saladino· MD
he says mccollum says the diet must contain two as yet unidentified substances or groups of substances which is just by the way those are fossil vitamins and water-soluble vitamins and he goes on he says one of these is is associated with certain fats and is especially abundant in butter fat egg yolk fats and the fats of the glandular organs such as the liver and kidney but is not found in any fats or oils of vegetable origin