In a prospective study of 16,818 adults, there was an inverse association between vitamin D levels and colorectal cancer mortality. During 6-12 years of follow-up, a serum vitamin D level of 80 nmol/L or higher was associated with a 72% reduced risk of colorectal cancer mortality, compared to vitamin D levels under 50 nmol/L.1
Although this study did not show a decrease in overall cancer deaths associated with vitamin D levels, a sister study showed a 26% lower overall mortality rate for those with higher vitamin D levels.2
1"Prospective Study of Serum Vitamin D and Cancer Mortality in the United States," Freedman DM, Looker AC, et al, J Natl Cancer Inst, 2007 Oct 30; [Epub ahead of print].
2"25-hydroxyvitamin D levels and the risk of mortality in the general population," Arch Intern Med. 2008 Aug 11;168(15):1629-37.
Jacob Teitelbaum, M.D. is one of the world's leading integrative medical authorities on fibromyalgia and chronic fatigue. He is the lead author of eight research studies on their effective treatments, and has published numerous health & wellness books, including the bestseller on fibromyalgia From Fatigued to Fantastic! and The Fatigue and Fibromyalgia Solution. Dr. Teitelbaum is one of the most frequently quoted fibromyalgia experts in the world and appears often as a guest on news and talk shows nationwide including Good Morning America, The Dr. Oz Show, Oprah & Friends, CNN, and Fox News Health.