Nutrition & Diet

Daily Vitamin D Supplement Raises Breast Cancer Chemo Success Rate by 79%

Researchers in Brazil found that taking a low daily dose of vitamin D alongside chemotherapy significantly improved outcomes for breast cancer patients. In a study of 80 women over 45, those who took 2,000 IU of vitamin D daily were nearly twice as likely to experience complete disappearance of their cancer compared to those on a placebo — 43% versus 24%. Most participants started the study with low vitamin D levels, and supplementation raised those levels throughout treatment. Scientists believe vitamin D may enhance the immune system's ability to support chemotherapy's cancer-fighting effects. The affordable, widely available supplement could offer a practical way to improve treatment success, though researchers caution that larger trials are needed to confirm these findings.