EFFECTS PRODUCED BY VITAMIN D ON ENERGY, APPETITE, AND OESTROUS CYCLES OF RATS KEPT ON AN EXCLUSIVE DIET OF YELLOW CORN

Abstract
The decreased activity, poor food intake, and constant state of diestrus produced in rats by an exclusive diet of yellow corn were all corrected by giving the animals access to a soln. of pure vit. D3, less readily by UV irradiation. Both vit. A acetate and a vit. A- and D-free distillate of cod liver oil were essentially without effect. The supplementary value of cod liver oil in an exclusive diet of yellow corn is probably due to its vit. D content. The symptoms of single food corn rats resemble those of hypophysectomized rats, and vit. D might achieve its effect indirectly through stimulation of the ant. hypophysis.