Abstract
Summary
A marked retardation in body and gonadal weight was observed in immature male rats fed a purified ration under conditions of low environmental temperature. Supplements of desiccated whole liver, water-insoluble liver residue or water-soluble liver extract resulted in a marked increase in both body and gonadal weight. A supplement of the known B vitamins was similarly effective. It is suggested that the protective effects of the various supplements were due, at least in part, to their vitamin B12 content.
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