Yes. There are many studies on this topic, and we have found that colonoscopy and colon cancer screening do save lives. It is estimated that over 158k people will be diagnosed with colon cancer in the United States this year, and 55k will die from it. A large, long-term study from Harvard School of Public Health concluded that 40% of all colorectal cancers could be prevented if people underwent colonoscopy screening. The National Polyp Study conducted in the United States found risk reductions of 76% to 90% among those screened with colonoscopy. These are just two examples of many studies showing that colonoscopy effectively helps prevent colon cancer by finding and removing polyps, ultimately saving lives.