Vitamin D3, cholecalciferol, is a fat-soluble vitamin. It is found
in food, but also can be made in your body after exposure to
ultraviolet rays from the sun. Vitamin D3 exists in several forms,
each with a different activity. Some forms are relatively inactive
in the body, and have limited ability to function as a vitamin.The
liver and kidney help convert Vitamin D3 to its active hormone form.
The major metabolic function of Vitamin D3 is to help the body absorb calcium resultng in stronger bones which reduces the risk of fracture & osteoporosis. Vitamin D3 is well known for the prevention of rickets too.
However, a number of medical studies have shown that Vitamin D3 appears to do much more. It is effective in reducing the risk of, or even protecting against a number of diseases/ conditions such as autoimmune diseases (e.g. type 1 diabetes, multiple sclerosis, rheumatoid arthritis), cancers (especially breast , ovarian, colon and colorectal ), heart disease, high blood pressure, type 2 diabetes & glucose intolerance, mood disorders & depression, obesity, influenza & common cold, chronic fatigue syndrome and infectious diseases. (read more)