Study links vitamin D deficiency to breast cancer

(NaturalNews) Researchers from the University of South Carolina (USC) recently conducted a study that found a clear connection between low vitamin D levels and some of the worst and most aggressive forms of breast cancer. Particularly in women with darker skin, those deficient in vitamin D were found to be eight times more susceptible to malignant breast cancer than are women with higher levels.

For the study, Susan Steck, Ph.D., M.P.H., and her colleagues from USC evaluated 107 women who had been diagnosed with breast cancer within the previous five years. Forty-seven of the women were Caucasian while the other 60 were African-American. All women provided blood samples to researchers who tested their levels of 25-hydroxyvitamin D (25-OH-D).

They found that women with triple-negative breast cancer -- meaning the tumors contain no estrogen, progesterone, or HER2 receptors -- had the lowest blood serum levels of vitamin D. Triple-negative breast cancer is now widely recognized as one of the worst and most aggressive breast cancers, since it spreads easily and quickly.

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