Colonoscopy is recommended for individuals of any age who are at higher than average risk for developing colorectal cancer.
Most early colorectal cancers produce no symptoms. This is why screening for colorectal cancer is so important. Screening tests can find polyps so they can be removed before they turn into cancer.
The American College of Gastroenterology in 2009 issued new guidelines recommending colorectal cancer screening after the age of 50.