One of the fat-soluble vitamins, vitamin D constitutes two major forms which are vitamin D2 or ergocalciferol and vitamin D3 or cholecalciferol. Vitamin D2 is synthesised by plants whilst vitamin D3 is synthesised by the body. Vitamin D is naturally present in a number of food sources and dietary supplements, and is also manufactured with the aid of sun exposure. It is produced within the body when ultraviolet-B or UVB rays from sunlight reaches the skin. The liver and the kidney eventually help to convert vitamin D to an active hormone form. http://www.evitalhealth.com/Calm_PRT.html
One of the fat-soluble vitamins, vitamin D constitutes two major forms which are vitamin D2 or ergocalciferol and vitamin D3 or cholecalciferol. Vitamin D2 is synthesised by plants whilst vitamin D3...
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