Under construction – not a live service
Sign in
What science says

What does science say about Cannabis and THC and cancer (all types)?

  • We don’t say yes or no. We show what has been studied.
  • Working in a lab or in animals does not mean it works in people.
  • Don’t stop or change your treatment without talking to your doctor.

What has been studied

  1. Lab studies (cells)Tests on cells in a dish.Source: PubMed · as of 11 Nov 2026 · Open the search at PubMed60studies
  2. Animal studiesTests in mice, rats or other animals.Source: PubMed · as of 11 Nov 2026 · Open the search at PubMed35studies
  3. Studies in peoplePublished studies with human participants.Source: PubMed · as of 11 Nov 2026 · Open the search at PubMed230studies
  4. Registered trials in peopleTrials entered in a public registry, whatever their result.ClinicalTrials.gov: 11 · as of 11 Nov 2026 · Open the search at ClinicalTrials.govEU CTIS: 0 · as of 11 Nov 2026 · Open the search at EU CTISBy phase:Phase 2 (4)No phase (3)Early Phase 1 (1)Phase 3 (1)Phase 1 (1)Phase 1/2 (1)By status:Recruiting (4)Running, not recruiting (3)Completed (3)Withdrawn before start (1)Countries (7):United States (5)Germany (2)United Kingdom (2)Austria (1)Canada (1)India (1)Netherlands (1)With a linked publication (results): 1 of 11The registries do not tell us here whether results were posted; a linked publication is shown instead.11trials
  5. Approved treatmentApproved by a medicines regulator for this disease.No

Cancer here means all 33 cancer types we cover.

Source: PubMed, ClinicalTrials.gov, EU CTIS · as of 11 Nov 2026

Examples of what we found

The trials

Thinking of paying for it? Read this first

  • Ask for published results. Stories, thank-you letters and "patients report" are not results. Ask where the results were published.
  • Know what you pay for. Ask in writing: what exactly is included, who gets the money, and what happens if you stop.
  • Ask your own doctor first. Some products interfere with chemotherapy, radiation or other medicines. Your treating doctor can check this.
  • Do not stop standard treatment for it. Do not stop or delay your treatment without talking to your care team.

Before you pay for a treatment

Not medical advice. Talk to the care team before changing treatment.

Report an error