Vitamin D and Breast Cancer Risk

X-Ray Mammogram

Boosting levels of vitamin D and calcium in post-menopausal women did not help them reduce their breast cancer risk.  This is the first real test on whether vitamin D actually causes poor health as opposed to just being a marker for poor health, and it failed.  So far, we have a few good studies to show that people with low vitamin D levels are more prone to illnesses such as cancer and heart disease, but there is no evidence yet that giving people vitamin D supplements will reduce their disease risk.  In a study of more than 36,000 post-menopausal women, those taking vitamin D and calcium supplements for seven years did not have any lower risk for breast cancer than those taking a placebo.  However, the door isn’t closed on vitamin D and breast cancer just yet.  It is possible women need to take the supplements when they’re younger to get benefits, or perhaps they’ll even need higher doses. 

 

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Vitamin D, Calcium and Breast Cancer Risk

Vitamin D, Calcium and Breast Cancer Risk

We know that vitamin D and calcium help fight osteoporosis in women. But now there is news from a major Harvard Medical School study that women who get a lot of vitamin D and calcium throughout their lives may cut the risk of breast cancer by almost third. The study looked at data for more than 10,500 premenopausal women and 21,000 postmenopausal women; they were 45 and older. These women were part of the Women’s Health Study. The study in humans supports prior studies in animals that found an association between calcium and vitamin D and breast cancer.

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