Valupak Multivitamin & Iron Tablets X 50

Vitamin D is a prohormone, which is the precursor to a hormone. In its raw form (sun exposure, foods, supplements), Vitamin D is inert and has to go through a series of complex biochemical reactions before your body can use it. These reactions produce calcitriol, which is the form of Vitamin D that is used by your body (D2 and D3).

Vitamin D is one of the only vitamins that your body can produce by itself. What is the catalyst that gets your D production going? Good old fashioned sunshine! It’s the ultraviolet-B radiation (UVB) that enables vitamin D production to occur in the skin.