Vitamin D May Affect Breast Cancer

Vitamin D levels may affect breast cancer survival, a study finds. Researchers measured vitamin D in the blood of 512 women with early-stage breast cancer. Only 1 in 4 women had vitamin D at recommended levels. In the next 10 years, the cancer was nearly twice as likely to come back or spread in women who did not have enough vitamin D. They were 73% more likely to die of cancer. The Associated Press wrote about the study May 16. It was released by the American Society of Clinical Oncology.