The general recommendation is that people at average risk for colon cancer should begin colonoscopy screening at age 45. Screening typically continues every 10 years until about age 75, assuming good health. For individuals at higher risk due to family history, previous colon polyps, or certain genetic conditions, screening may need to start earlier and be more frequent. After age 75, the decision to continue screening should be individualized based on health and personal factors, and it is generally not recommended after age 85.

Key points:

• Average-risk adults start at age 45.
• Screening interval is typically every 10 years if colonoscopy is used.
• People with higher risk factors should consult their doctors for tailored advice.
• Screening can stop by age 75 or 85 based on individual health.

This guidance reflects updated U.S. recommendations due to rising colorectal cancer rates in younger adults.