Screening
Why bowel cancer screening now starts at 45 in some countries
Strong evidenceStudy published May 2021 · 3 min read
The takeaway
Bowel cancer is rising in younger adults, and screening from 45 can catch it earlier.
Why this matters to you
Many people still believe screening starts at 50. Knowing the change can lead to earlier checks.
What the researchers did
Expert panels reviewed cancer trends and modelling studies to weigh the benefits and harms of starting screening earlier.
What they found
- Cases in people under 50 have been rising for decades.
- Starting at 45 was estimated to prevent more cancers and deaths with acceptable risks.
How strong is the evidence?
Formal guideline based on systematic review and modelling.
What this does NOT mean
- Guidance differs by country — check your local programme.
- Not everyone needs a colonoscopy; stool tests are an option.
Questions to ask your doctor
- When should I start screening, given my family history?
- Which test is right for me?
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