Here's some good news: Deaths from colorectal cancer have been dropping since the 1980s. There's no mystery as to why — more people are getting tested.
Colorectal cancer occurs when cells in the lower digestive tract grow out of control. Most of these cells start out as noncancerous polyps. Removing the slow-growing polyps can prevent cancer before it starts.
According to the American Cancer Society, anyone at average risk for colon cancer should start regular screenings at age 45.
There are some risk factors you can control and some you can't.
Living a healthy lifestyle is one factor in your control. Maintain a healthy weight, stay physically active and don't smoke. Enjoy a low-fat diet rich in fiber, fruits, vegetables and whole grains. Avoid a diet that is heavy on red meats and processed meats. Keep vitamin D levels normal.
Of course, some factors are out of your control. If you have a personal or family history of polyps, you may be at higher risk. A history of inflammatory bowel disease or Crohn's disease could also put you at higher risk.
Unless you have some of the high risk factors, you should get screened every 10 years until age 75. If you have risk factors, your doctor will probably recommend screening every five years.