Low Vitamin D Levels Common in Breast Cancer

More than half of women with breast cancer have low vitamin D levels. Although no studies have proven cause and effect, several have suggested a link between low vitamin levels and breast cancer risk and progression.

Breast cancer cells have vitamin D receptors. When these receptors are activated by vitamin D, it triggers a series of molecular changes that can slow cancer cell growth and cause the cells to die.

According to WebMD:

“Even if it does not have a direct effect on the tumor, vitamin D is needed to maintain the bone health of women with breast cancer ... That's especially important given the increasing use of aromatase inhibitors, which carry an increased risk of bone fractures”.

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