Vitamin D-

Deficiency of vitamin D results into “ Rickets” which is characterized by lack of calcification of hypertrophic cartilage zone and thus the bones are affected. Vitamin D plays an important role in the absorption of calcium and phosphorus from intestinal tract. In ricketier persons the phosphate blood serum level is high which is brought down to a normal value by this vitamin. Vitamin D is used in rickets and for the management of hypocalcemia. In fully grown bones in adults there is a tyupe of deective mineralization of ostoid tissue termed as Osteomalacia