Vitamin D3 promotes the absorption and function of calcium for teens and children, producing healthy teeth and bones. In adults it prevents loss of bone mass and treats certain bone disorders.
Vitamin D3 also protects against adult and elderly muscle weakness and immune system problems, and lowers the risk of colon, breast, and prostate cancers. Rheumatoid arthritis and psoriasis is improved with vitamin D3.
Vitamin D3 also prevents and treats rickets and post-menopausal osteoporosis. It has also been used in the treatment of hypoglycemia, Multiple Sclerosis and type 1 diabetes.