Some carbohydrates may increase your risk for cancer. Researchers have found another reason why you should avoid bad carbs like soda, pizza, and fast food. “They’ve presented their findings at the American Society for Nutrition Scientific Sessions and Annual Meeting, and note that the link is strongest to prostate cancer, which is nearly twice as common among men who eat ‘bad’ carbs over ‘good’ ones, such as legumes and whole grains.” While the study was done on mostly white volunteers, the results seem to be significant enough for continued study.