"Vitamin D concentrations > 40 ng/ml were associated with substantial reduction in risk of all invasive cancers."
"Specifically, there was a 77% lower incidence rate of breast cancer for >40 ng/ml vs no supplementation at all."
"These results show the importance of vitamin D for the prevention of cancer."
What You Need To Know:
What this, and previous studies show, is that vitamin D deficiency significantly increases cancer risk and vitamin D sufficiency significantly and dramatically decreases cancer risk.
A study by Lowe et al. published in the European Journal of Cancer in 2005 reported an 83% reduction in breast cancer risk for women with high vs low vitamin D levels.
A study by Mohr et al. in 2014 showed that breast cancer patients with the highest levels of vitamin D had approximately half the fatality rate of patients with the lowest levels of vitamin D.
A four year study by Lappe et al. published in the American Journal of Clinical Nutrition in 2007 reported a 77% reduction in all invasive breast cancers in women who supplemented with vitamin D vs those who did not supplement.
REFERENCE: McDonnell et al. (April 2016) Serum 25-Hydroxyvitamin D Concentrations >40 ng/ml Are Associated with >65% Lower Cancer Risk: Pooled analysis of randomized Trial and prospective Cohort Study PLos One 11(4)