Intestinal Calcium Transport: Stimulation by Low Phosphorus Diets

Abstract
Rats maintained on a low phosphorus diet supplemented with 25-hydroxyvitamin D3 show high intestinal calcium transport activity as compared to rats similarly treated but fed a diet containing adequate phosphorus. This increased transport activity is correlated with an increased biosynthesis of 1,25-dihydroxyvitamin D3, the probable metabolically active form of the vitamin in the intestine.
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