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