Results of a recent study by researchers at the US National Cancer Institute (NCI) have revealed that men who take too much zinc may be increasing their risk of developing prostate cancer. Dr Michael Leitzmann and colleagues examined surveys filled out by 46,974 male health professionals. Results showed that men who took more than 100 mg of zinc a day had more than twice the risk of advanced prostate cancer, compared with men who did not take supplementary zinc. The recommended daily intake of zinc is 11 mg, however it is thought that at least 10% of men who take supplementary zinc take two-to-three times more than the recommended amount.
SOURCE/REFERENCE: J Natl Cancer Inst 2003; 95: 1004-1007
