Vitamin D associated with a lower risk of breast cancer

Some earlier studies on vitamin D and breast cancer have had inconsistent results.

In this study, doctors measured vitamin D levels in 627 Brazilian women, aged 45 to 75, 209 of whom had breast cancer and 418 similar women who did not. Women with breast cancer were 43 percent more likely to be obese and 13 percent more likely to have insufficient levels of vitamin D or to be deficient.

Doctors said similar studies found women with higher vitamin D levels were more likely to survive, and that women with breast cancer should try to restore vitamin D levels to the normal range.

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