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A study from the National Cancer Institutes shows that taking more than 100 mg a day of zinc supplements a day doubles a man's chances of developing advanced prostate cancer.

The prostate contains the highest concentration of zinc of any tissue in the body. Semen contains the highest concentration of zinc of all body secretions. Because of this, many men take zinc supplements, even though there is no evidence that taking zinc can treat impotence, prostate enlargement or cancer. Sellers of Zinc supplements base their recommendations to take zinc on studies from Egypt and Iran that show that boys who are deprived of zinc do not develop normal sexual characteristics. This study from the National Cancer Institute shows that men who take more than 100 mg a day of zinc double their risk for advanced prostate cancer, as did men who took the supplements for 10 years or more.

In the United States, 10 percent of men who take zinc supplements take 2 to 3 times more than the recommended 11 mg of zinc/day. Journal of the National Cancer Institute, July, 2003

Checked 8/9/05

May 16th, 2013
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About the Author: Gabe Mirkin, MD

Sports medicine doctor, fitness guru and long-time radio host Gabe Mirkin, M.D., brings you news and tips for your healthful lifestyle. A practicing physician for more than 50 years and a radio talk show host for 25 years, Dr. Mirkin is a graduate of Harvard University and Baylor University College of Medicine. He is board-certified in four specialties: Sports Medicine, Allergy and Immunology, Pediatrics and Pediatric Immunology. The Dr. Mirkin Show, his call-in show on fitness and health, was syndicated in more than 120 cities. Read More
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