Vitamin D Knowledge ►► http://bit.ly/1US4jZy

Vitamin D Knowledge ►► http://bit.ly/1US4jZy

Vitamin D is a group of fat-soluble secosteroid hormones and vitamins consisting of cholecalciferol (vitamin D3) and ergocalciferol (vitamin D2). Vitamin D can be acquired from sun exposure, food, and supplements. However, it exists in a biologically inert form from these sources, so the body must activate it through two hydroxylation processes before it can be used... read more!

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http://www.herbs-info.com/blog/vitamin-d-knowledge/?i=g

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