Did you think that smoking only contributed to lung cancer? Wrong -- smoking cigarettes affects the entire body, including the digestive system. Smoking can increase the risk of several cancers, and colon cancer is more likely to be fatal for long-time smokers than non-smokers. One more good reason to quit -- or encourage someone else to do so.
Sources:
American Cancer Society. "What Causes Colorectal Cancer?" American Cancer Society, Inc 2009. 10 Feb 2009.
