Abstract
Summary
The effects of vitamins D2, D3, and of Ertron and A.T.10 on serum calcium have been compared. Crystalline vitamin D2 and Ertron are statistically indistinguishable in their effects. Vitamin D3 produces a more prolonged hypercalcemia than does vitamin D2. On the basis of responses to the above preparations, A.T.10 produces an effect far greater than would be predicted from its antirachitic value.
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