Roles of Solar UVB and Vitamin D in Reducing Cancer Risk and Increasing Survival
WILLIAM B. GRANT, wbgrant at infionline.net;
Sunlight, Nutrition, and Health Research Center, San Francisco, CA, U.S.A.
The present article reviews existing scientific evidence in support of the ultraviolet-B (UVB)–vitamin D–cancer hypothesis, now being in its 35th year. Literature evidence comes from geographical ecological and observational studies, two successful clinical trials, and an understanding of how vitamin D reduces risk of and increases survival from cancer. Each approach has its strengths and limitations, and considering findings from all of these approaches yields the best conclusions. There exist over 15 types of cancer for which UVB exposure and/or 25-hydroxyvitamin D [25(OH)D] concentrations have been found associated with reduced risk.
The optimal 25(OH)D concentration for preventing and surviving cancer appears to be above 75-100 nmol/l. There exists mounting evidence that individuals with higher 25(OH)D concentration at the time of cancer diagnosis have better cancer-specific and overall survival rates, suggesting that cancer-affected people should raise their 25(OH)D concentrations.
Copyright© 2016 International Institute of Anticancer Research (Dr. John G. Delinassios), All rights reserved
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See also Vitamin D Life
- Cancer risk reduced 65 percent by vitamin D levels greater than 40 nanograms – April 2016
- Off topic – More money to be made in TREATING cancer than PREVENTING it – NYT Dec 2015
- Vitamin D does not improve cancer survival much – when dose size, etc. is ignored – Oct 2015
- Cancer deaths of senior women 60 percent more likely if low Vitamin D – March 2015
- Cancer incidence in 87 countries is related to food, smoking, alcohol, GDP, and UVB - Jan 2014