Multivitamins and prostate cancer risk
About a third of American adults take some type of multivitamin on a regular basis. In nearly every case, the goal is better health, even though there is no firm evidence to support this hope. The absence of benefit is one thing, but the presence of harm is another: A 2007 report in the Journal of the National Cancer Institute concluded that there was an increased prostate cancer risk among men using multivitamins, reports the October 2007 issue of Harvard Men's Health Watch.
When scientists further explored this finding, they found no link between multivitamin use and the risk of developing localized prostate cancer. But they did find that men who take multivitamins more than once a day were 32% are more likely to develop advanced prostate cancer and 98% more likely to die from the disease.