Cholecalciferol is vitamin D3 supplement which is a dietary supplement that is prescribed for vitamin D deficiency. It is consumed by dissolving in milk or water or as prescribed by physician on regular basis. This granular formulation is known to prevent chances of rickets & bone disorders with ability to maintain normal blood calcium level. It is also admired for increasing absorption of dietary calcium by body. This supplement is considered to be highly effective in familial hypophosphatemia and hypoparathyroidism. Cholecalciferol has chemical formula C24H44O with molar mass of 384.64 and is considered to be safe during pregnancy in normal doses.