Cholecalciferol (toxiferol, vitamin D3) is one of the five forms of vitamin D.It is a secosteroid, that is, a steroid molecule with one ring open. This and all forms of vitamin D are misnamed: vitamins by definition are essential organic compounds which cannot be synthesized by the body and must be ingested; cholecalciferol is synthesized by the body, and functions as a prehormone.
Vitamin D3 is a fat soluble vitamin, is used as a precursor for calcium, phosphorus metabolic hormones, it has close relationship with sunshine, so also called 
the "sunshine vitamin".  

Vitamin D3 is fat soluble, insoluble in water, can dissolve in fat or fat solvents, high temperature and oxidation in neutral and alkaline solution. For rickets, osteomalacia and baby brothers tetany, rickets and dental caries prevention and control of this product is also available. Larger doses for cutaneous tuberculosis, skin and mucous membrane also each lupus erythematosus (sle), etc.  Vitamin class medicine,Mainly to promote intestinal absorption and sediment of calcium and phosphorus and sediment, for the treatment of diseases rickets and osteomalacia.

1. Vitamin D3 pharmaceutical grade is widely used in medicine supplemets;
2. Vitamin D3 pharmaceutical grade is widely used as nutrition fortifier;
3. Vitamin D3 pharmaceutical grade is widely used in nutraceuticals;
4. Vitamin D3 pharmaceutical grade is widely used in food products,
5. Vitamin D3 pharmaceutical grade is widely used in feed Additives.