Metabolism of Calcium in Normal, Rachitic and Vitamin D-Treated Rats as Evidenced by Radiocalcium Ca45 Studies

Abstract
These expts. suggest that vit. D in rachitic rats increases Ca absorption of Ca from the gastrointestinal tract, aids in mobilizing in- organic P from organic sources and locally accelerates the mineralization of bone. Active healing of rachitic bone, as shown by the upswing in the curve of deposition of Ca45; begins between the 48th and 72d hr. after the admn. of the vit.