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Ontario lowers colorectal cancer screening age to 45

Ontario lowers colorectal cancer screening age to 45

Rule Changes

Ontario is the second Canadian province to open at-home colon cancer testing to residents in their late 40s.

Today: Ontario lowers screening age to 45

Overview

Starting July 1, 2026, an Ontarian who turns 45 can order a colon cancer test and do it at home. Until now, they had to wait until 50.

The change opens routine screening to hundreds of thousands more people. Colorectal cancer is rising among adults under 50, and catching it early can mean a minor procedure instead of chemotherapy.

Why it matters

Screening five years earlier means more Ontarians catch colorectal cancer while it is still curable, instead of after it spreads.

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Key Indicators

45
New screening start age
Down from 50, matching guidance already adopted in the United States.
2nd
Province to make the change
Prince Edward Island moved first, in March 2026.
90%
Cure rate when caught early
About nine in ten colorectal cancers can be cured if found at an early stage.
Hundreds of thousands
Newly eligible residents
Ontarians aged 45 to 49 who can now request the test.

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People Involved

Barry Stein
Barry Stein
Advocating for the same screening age across all provinces
 Trish Riley
Trish Riley
Recovered after surgery and chemotherapy
 Elizabeth Holmes
Elizabeth Holmes
Backing wider adoption of the lower age

Organizations Involved

Ontario Health
Ontario Health
Provincial health agency
Running the expanded screening program

The provincial agency that runs ColonCancerCheck, Ontario's organized colorectal screening program.
Colorectal Cancer Canada
Colorectal Cancer Canada
Patient advocacy organization
Pushing for a uniform national screening age

A national advocacy group pressing every province to start screening at 45.
Canadian Cancer Society
Canadian Cancer Society
National charity
Backing the lower screening age

The national cancer charity lobbying provinces to screen at 45.

Timeline

May 2021 July 2026

3 events Latest: Today

  1. Ontario lowers screening age to 45

    Today Policy

    Ontario opens the at-home FIT test to residents aged 45 to 49. Doctors can order it immediately; invitation letters go out in phases.

  2. Prince Edward Island goes first

    Policy

    P.E.I. becomes the first Canadian province to lower its routine screening age from 50 to 45. Residents 45 to 49 can request mailed stool tests.

  3. U.S. task force lowers its recommended age to 45

    Guideline

    The U.S. Preventive Services Task Force recommends starting colorectal cancer screening at 45, citing rising cases in younger adults.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

May 2021

U.S. lowers colorectal screening age to 45 (2021)

The U.S. Preventive Services Task Force cut its recommended screening age from 50 to 45. It cited a steady rise in colorectal cancer among adults in their 40s. The American Cancer Society had already made the same call in 2018.

Then

Insurers were required to cover screening at 45, and testing among people in their late 40s climbed.

Now

The 45 threshold became the North American benchmark that Canadian provinces are now adopting one by one.

Why this matters now

Ontario's change follows the same evidence and lands on the same age the U.S. adopted five years earlier.

August 2020

Chadwick Boseman's death (2020)

The actor Chadwick Boseman died of colon cancer at 43. He had been diagnosed at 39 and kept it private while continuing to work. His death drew wide attention to cancer striking people far below the old screening age.

Then

Searches for colon cancer symptoms and screening spiked in the weeks after his death.

Now

His case became a reference point in the push to screen younger adults.

Why this matters now

It put a recognizable name on the trend Ontario is responding to: colorectal cancer in people under 50.

March 2000

The 'Couric effect' (2000)

Journalist Katie Couric had a colonoscopy broadcast on national television after losing her husband to colon cancer at 42. She wanted to strip the stigma from the procedure. Millions watched.

Then

Colonoscopy rates jumped in the months that followed, an effect researchers later measured and named after her.

Now

It showed that public awareness, not just policy, drives whether people actually get screened.

Why this matters now

Ontario's lower age only helps if people act on it; the Couric case shows uptake depends on awareness as much as eligibility.

Sources

(5)
+2
CBC News Global News Canadian Cancer Society Global News Global News