The risk factors for colorectal cancer may be reduced with regular checkups and lifestyle changes. The American Cancer Society recommends that men and women have a colonoscopy beginning at age 50. African Americans have a higher risk of colorectal cancer and should begin screening at the age of 45. If you have a family history of colorectal cancer, you should get screened 10 years earlier than when your family member was diagnosed. For example, if your father was diagnosed with colon cancer at 48, you should talk to your doctor about getting a colonoscopy at 38. Talk to your doctor about how often you should get a colonoscopy. The procedure may be able to help your doctor spot cancer in its early stages. And pre-cancerous polyps may be removed and biopsies performed during the procedure, if necessary. Changes in your lifestyle may also help lower your colorectal cancer risk. Obesity, smoking, alcohol, diet and a sedentary lifestyle have been linked to increased risks for colorectal cancer.