Supplements in excess shown to increase risk of cancer
University of Colorado Cancer Center investigator Tim Byers, MD, MPH, has research that indicates that over-the-counter supplements may actually increase cancer risk if taken in excess of the recommended daily amount. Taking extra vitamins and minerals may do more harm than good. This research started 20 years ago with the observation that people who ate more fruits and vegetables tended to have less cancer. Researchers wanted to see if taking extra vitamins and minerals woul