THE METABOLISM OF CALCIUM AND PHOSPHORUS AS INFLUENCED BY VARIOUS ACTIVATED STEROLS

Abstract
The effects of single massive doses of vits. D2, D3, and of Ertron and A.T. 10 on the Ca and P metabo- lism of dogs were compared. Vit. D2 and Ertron influence serum Ca alike. Vit. D3 induces a persistent moderate hypercalcemia. A.T. 10 causes a rapid rise of serum Ca followed by a comparatively rapid fall. All of the products cause a rise in serum P (Ertron was not studied). All of the products decrease fecal and increase urinary outputs of Ca and P. All of the products except vit. D3 improved Ca balances; Ertron improved the P balance slightly.