Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
This daily dose of zinc increases your risk of prostate cancer
Scientists have known for years about an association between the use of zinc supplements and prostate cancer. [Eur Urol. 2007 Oct;52(4):1052-6.] Thanks to an American study that followed tens of thousands of adult men for thirty years, we now know fairly precisely how many milligrams of zinc you need to take every day for years to increase your risk of prostate cancer.
During this period, 6,980 men developed prostate cancer. Of these, 1053 men died of their illness.
The researchers knew the men's use of nutritional supplement use. In their study, soon to be published in the European Journal of Epidemiology, they looked at whether there was a link between the use of zinc supplements and prostate cancer.
However, men who binned 75 milligrams or more of zinc daily for 15 years or more were 76 percent and 80 percent more likely to develop deadly and aggressive forms of prostate cancer, respectively, than men who did not take supplements.
The researchers are therefore explicitly talking about excessive use. Men who want to boost their immune system through short-term zinc cycles need not worry.