Adults between the ages of 50 and 75 should get a colonoscopy, according to the Centers for Disease Control. Regular colonoscopies are the best way to prevent colon cancer.
Though 50 is the age at which most people should start getting a colonoscopy, some people should get one before that, explains the Centers for Disease Control. People who have previously had colorectal polyps or cancer, or have a relative who has had these conditions, should get a colonoscopy before the age of 50. Those who have conditions such as Crone's disease, inflammatory bowel disease or ulcerative colitis should also start screening earlier than 50. A doctor may also suggest an early colonoscopy for those with hereditary conditions such as Lynch syndrome.