Breast cancer patients with low levels of vitamin D were much more likely to die of the disease or have it spread than patients getting enough of the nutrient, a study found — adding to evidence the "sunshine vitamin'' has anti-cancer benefits.The results are sure to renew arguments about whether a little more sunshine is a good thing.
The skin makes vitamin D from ultraviolet light. Too much sunlight can raise the risk of skin cancer, but small amounts — 15 minutes or so a few times a week without sunscreen — may be beneficial, many doctors believe.
While the vitamin is found in certain foods and supplements, most don't contain the best form, D-3, and have only a modest on blood levels of the nutrient. That's what matters, the Canadian study found.
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