Dr. Michael F. Holick, Ph.D., M.D.
Dr. Michael F. Holick

Cancer and Vitamin D

Posted by admin on November 27, 2008 under Cancer, Vitamin D | 8 Comments to Read

 

Cancer

As early as 1941, it was observed that people living at higher latitude were at higher risk of dying of cancer.  In the 1980’s and the 1990’s, several reports surfaced revealed that living at higher latitude and being at higher risk of vitamin D deficiency increased risk of developing and dying of cancers of the colon, rectum, prostate, breast, ovary.  More recently, vitamin D deficiency has been associated with increased risk of developing many other cancers including cancer of the esophagus, pancreas and leukemia.   Read more of this article »

Welcome to VitaminDHealth.org

Posted by mfholick on November 26, 2008 under Vitamin D | 95 Comments to Read

 Michael F. Holick, PhD, MD
 Professor of Medicine, Physiology and Biophysics
 Director of the General Clinical Research Center
 Director of the Vitamin D, Skin and Bone Research Laboratory
 Director, Biologic Effects of Light Research Center
 Boston University Medical Center
 

               Help spread the word about Vitamin D deficiency in 2013:

Dr. Holick’s new book The Vitamin D Solution is now available! Click on the book cover for more information on how to order.

Vitamin D is not a vitamin but a hormone. It is unique in that it is made in the skin as a result of exposure to sunlight. Photosynthesis of vitamin D has been occurring on earth for more than 750 million years. Some of the earliest life forms that were exposed to sunlight for their energy requirement were also photosynthesizing vitamin D. Both children and adults have in the past depended on adequate sun exposure to satisfy their vitamin D requirement. It is well documented that at the turn of the last century upwards of 80% of children in the industrialized, polluted cities of northern Europe and northeastern United States suffered from the devastating consequences of vitamin D deficiency rickets. The skin has a large capacity to make vitamin D. Exposure of a person in a bathing suit to a minimal erythemal dose of sunlight, which is typically no more than 15-20 minutes on Cape Cod in June or July at noon time, is the equivalent to taking 20,000 IU of vitamin D orally. It is now well documented that in the absence of any sun exposure 1,000 IU of vitamin D3 a day is necessary to maintain healthy levels of 25-hydroxyvitamin D in the circulation. An analysis of the NHANES III data has demonstrated that neither children nor adults are receiving an adequate amount of vitamin D from their diet or from supplements.

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