Vitamin D

What is it?

Vitamin D is a group of fat-soluble prohormones, the two major forms of which are D2 (or ergocalciferol) and D3 (or cholecalciferol). The term vitamin D also refers to metabolites and other analogues of these substances. Vitamin D3 is produced in skin exposed to sunlight, specifically ultraviolet B radiation.

The Benefits

Regulates the calcium and phosphorus levels in the blood by promoting their absorption from food in the intestines, and by promoting re-absorption of calcium in the kidneys.

It promotes bone formation and mineralization and is essential in the development of an intact and strong skeleton. However, at very high levels it will promote the resorption of bone.

It inhibits parathyroid hormone secretion from the parathyroid gland.

Affects the immune system by promoting phagocytosis, anti-tumor activity, and immunomodulatory functions.

Much more than Vitamin D is discussed at the Natural Source Vitamins Homepage