Eating a lot of chicken may lower your risk of colon cancer, a new study shows.Maybe it is the selenium and calcium in chicken. Maybe chicken eaters consume less-processed meat -- a risk factor for colon cancer. The reason isn’t clear.Whatever the reason, people who ate a lot of chicken had an associated 21% lower risk of all adenomas -- growths that can be precursors of colon cancer -- than those who ate little chicken. The risk was 39% lower for the greater threat of advanced adenomas. The findings come from data collected on 1,520 people who volunteered to have repeated colonoscopies in two large clinical trials.The report, from Douglas J. Robertson, MD, MPH, of Dartmouth Medical School, and colleagues, appears in the December issue of the American Journal of Gastroenterology.