Ontario lowers colorectal cancer screening age to 45 in 2026

Ontario will lower its colorectal cancer screening age from 50 to 45 starting July 1, 2026. The decision follows a rise in diagnoses among younger adults. Health officials describe the move as a necessary response to changing trends in cancer rates. The change brings Ontario in line with other regions, including the United States and Australia, which have already reduced their screening age to 45. Prince Edward Island became the first Canadian province to adopt this policy in March 2026.

A fecal immunochemical test (FIT) will remain the standard screening method. Those who receive a positive result will be referred for a colonoscopy. People with normal results will need to repeat the test every two years. The update also affects individuals with a family history of colorectal cancer, though specific adjustments for this group have not yet been detailed. Colorectal Cancer Canada has welcomed the decision, calling it a significant improvement in early detection efforts. Recent data shows that people under 50 are now two to 2.5 times more likely to develop colorectal cancer than previous generations. This sharp increase has pushed health authorities to rethink screening guidelines.

The new policy aims to catch cases earlier in younger adults. With screening starting at 45, Ontario hopes to reduce late-stage diagnoses and improve survival rates. The shift reflects broader efforts to adapt cancer prevention strategies to current health trends.