Rung 2 · Limited
Multi-cancer blood tests (e.g. Galleri)
Finds more cancers, but missed its main goal in the largest trial.
Early detectionWith your doctor
What studies found
In NHS-Galleri (about 142,000 adults), adding yearly blood tests did not reduce stage III–IV cancers, the primary goal. Stage IV diagnoses were 14% lower, a secondary result.
The catch
No evidence yet that it reduces cancer deaths. It does not replace standard screenings.
What to do
If you consider one, use it only on top of your recommended screenings.
Sources
Rung 2 of 5, Limited: Few, small or conflicting human studies, or only indirect measures such as blood markers. How we score
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Related
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- Yearly low-dose CT for people with a heavy smoking historyRung 5 · EstablishedWith your doctorRung 5 · EstablishedEarly detectionWith your doctor
- Colonoscopy every 10 yearsRung 4 · StrongWith your doctorRung 4 · StrongEarly detectionWith your doctor
Every option we rated, or follow one cancer step by step: breast cancer, colorectal cancer, lung cancer and prostate cancer.