High levels of vitamin D are associated with a lower risk for breast cancer, according to results of a recent study conducted by researchers from the University of California San Diego School of Medicine. This study, published online in PLOS One, was performed in collaboration with Creighton University in Omaha, Nebraska; the Medical University of South Carolina in Charleston; and GrassrootsHealth, a nonprofit organization that promotes vitamin D research based in Encinitas, California.
For this study, the researchers gathered information from two clinical trials with a total of 3,325 participants and a prospective study involving 1,713 participants, conducted between 2002 and 2017. All of the participants were women over the age of 55, were cancer-free at the start of the study, and were followed for an average of four years, during which time researchers measured blood levels of vitamin D at periodic visits.
According to researchers, 77 new cases of breast cancer were diagnosed during the study period. Women with vitamin D levels above 60 ng/mL (nanograms/milliliter) developed breast cancer at one-fifth the rate of women with levels below 20 ng/mL. Other studies have linked vitamin D deficiency with an increased breast cancer risk.
Sourced from: PLOS One