New research has found daily Vitamin D supplementation may reduce the risk of breast cancer in older women.
Over 200 postmenopausal women participated in this randomized, controlled clinical trial. All the women in the study were overweight or obese. Each participant supplemented with 2000 IU of Vitamin D daily. The study lasted 1 year. The greatest reductions in blood estrogens, a known risk factor for breast cancer, were seen in the women whose Vitamin D levels jumped the most.
Researchers suggested that “Vitamin D supplementation may be a practical alternative to estrogen lowering drugs to help overweight and obese women lower their risk of breast cancer”. Medications prescribed to lower blood estrogens, like aromatase inhibitors, while reducing the risk of breast cancer development in women who have an increased risk for the disease, may have adverse effects.
Prior research suggests Vitamin D may aid younger women fight breast cancer also. A prospective study found reduced serum Vitamin D levels in the months before a diagnosis of breast cancer may be a predictor of a higher risk for this disease.
More studies are needed.
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