Ontario lowers colorectal cancer screening age to 45 in 2026

Ontario will lower the recommended age for colorectal cancer screening from 50 to 45, starting July 1, 2026. The decision follows rising cases of early-onset colorectal cancer and aligns with updated expert guidance. Health officials have introduced new testing methods to address the growing concern. The updated guidelines come after evidence showed people under 50 are now two to 2.5 times more likely to develop colorectal cancer than previous generations. Ontario’s move mirrors actions taken in other regions, including Prince Edward Island, which reduced its screening age to 45 in March 2026. The United States and Australia have also adopted the same age threshold.

The province will use the fecal immunochemical test (FIT) as the primary screening tool. Those with normal results will need to retake the test every two years. A positive FIT result will lead to a referral for a colonoscopy to confirm or rule out cancer.

Additionally, Ontario is lowering the recommended age for colonoscopies for individuals with a family history of colorectal cancer. The government will send screening invitations in stages, while doctors can order FIT for anyone aged 45 to 49 beginning July 1, 2026. The changes aim to detect colorectal cancer earlier in younger adults, reducing delays in diagnosis. With the new screening age and testing process, Ontario hopes to improve outcomes for those at higher risk. The phased rollout ensures a smooth transition for both patients and healthcare providers.