REVIEW ARTICLE ON (3Î',5Z,7E)-9,10-SECOCHOLESTA-5,7,10(19)-TRIEN-3-OL (CHOLECALCIFEROL)

Vitamin D called as sunshine. There are varieties of sources available for cholecalciferol but mainly dairy, sea food and synthesized products are used. Calcitriol deficiency increased now days due to imbalanced life cycle and some desired and undesired effects of medications. We discuss about calcitriol life cycle from UV rays to immersion in the body as 7-Dehydrocholesterol to calcitriol. There are some parameters which effects on calcitriol absorption like age, skin color, disease, medications etc and discussed how to overcome calcium deficiency.