Dr. Cedric Garland shares if sun exposure provides enough vitamin d3 to reduce a woman's cancer risk.
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Does sun exposure provide enough vitamin D3 to reduce a woman’s cancer risk? Dr. Cedric Garland: It depends on the season and how much of skin the woman is able to expose as a practical matter, how regularly she gets out into the sun, and where she lives. There are about a hundred variables that affect it, but if a woman lives in a sunny place and is able to get 40% of her skin exposed daily for half a year, then chances are that she will be getting enough vitamin D to do everything that vitamin D can do. But a woman living say in the northern part of the United States, who can’t get out in the sun very much or nearly as much as the woman in the southern tier, she probably is going to need vitamin D from food or supplements to get to the level in the serum that she and her doctor or nutritionist decide is optimal for her.

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