http://www.futurity.org/top-stories/low-vitamin-d-may-raise-cancer-risk/
U. ROCHESTER (US) — Two new vitamin D studies suggest intriguing ties between a deficiency of D and breast and colon cancer, particularly among African Americans.
The research adds to mounting evidence that some connection exists between vitamin D and cancer, although it is not yet known how vitamin D modifies or contributes to cancer risk. Evidence is also inconsistent as to whether vitamin D might be used for cancer prevention.
Many of the body's tissues and cells have vitamin D receptors, making it a potent regulator of cell activity and growth. Researchers report vitamin D might generally improve DNA repair, reduce inflammation, and promote the death of potentially malignant cells.
