It's the vitamin associated with the sun that we absorb through our skin, and increasingly block out when we use sunblock, to avoid getting skin cancer.

VOA: standard.2010.05.28

Exposure to the sun's rays normally generates Vitamin D in the skin, but applying sun block stops that process.

BBC: Rickets warning over breastfeeding

Protein acts like a building block for your muscles and skin and organs.

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Cosmetics, hair care companies Kenra, Sexy Hair and Alterna, and skin care brand Perricone MD, rumored to be on the block since May.

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