7-Dehydrocholesterol is a zoosterol that functions in the serum as a cholesterol precursor, and is adapted to pre-vitamin D3 in the skin, accordingly activity as provitamin-D3.
The attendance of this admixture in beastly derma enables bodies to accomplish vitamin D3 from ultra-violet application in the sun light, via an average isomer pre-vitamin D3. It is aswell begin in the milk of several beastly species. It was apparent by Nobel-laureate amoebic chemist Adolf Windaus.
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