Vitamin A and carotene

Abstract

THE determination of a value for the vitamin A reserve which may be considered typical for the normal human being constitutes a problem of considerable import- ance in nutritional research. It is equally important to discover whether in any ordinary diseases, as opposed to acknowledged deficiency diseases, low vitamin A reserves are prevalent. Wilson [1927] made the first attempt to answer these questions by determinations of the vitamin A content of specimens of liver obtained at autopsy. Similar investigations have since been carried out by