The short answer
Mistletoe extract is used in some countries alongside cancer care, and some people online call it a cure. The FDA has not approved it to treat cancer or any other condition. Studies in people have had mixed results, and it has side effects. Talk with your care team before trying it.
The FDA has not approved mistletoe extract as a treatment for cancer or any other medical condition.
Studies in people have had mixed results. Some reported longer survival or better quality of life; others found no difference.
Mistletoe extract can cause side effects, and rare severe allergic reactions have been reported.
There is no good evidence that mistletoe can replace standard cancer treatment.
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The whole article, with every detail and caution.
The simple version
This page is for anyone who has read that mistletoe extract can cure cancer. Mistletoe extract is used in some countries as an add-on to cancer care. The FDA has not approved it to treat cancer or any other medical condition. Studies in people have had mixed results, and none show that it can replace standard treatment.
Mistletoe is not a proven cancer cure.
Why people hear about it
Mistletoe extract has a long history of use in parts of Europe. It is usually given as a shot under the skin. Online, that history is sometimes turned into a promise that it cures cancer. Being used for a long time does not prove that something works.
What studies in people found
NCI reviews many studies of mistletoe extract. Its summary says the results are mixed:
- Some studies reported that people who got mistletoe lived longer or had a better quality of life.
- Other studies found no difference. For example, NCI notes one trial in melanoma that found no increase in survival time.
When results point in different directions, the honest answer is that a benefit has not been shown.
Side effects
NCI lists these common effects:
- Soreness and inflammation where the shot is given
- Headache, fever, and chills
- Nausea
- Feeling very tired
NCI also says a few cases of severe allergic reactions, including anaphylactic shock, have been reported. If you have trouble breathing, or swelling of the face or throat, after any shot or product, call 911.
Red flags to watch for
The FDA warns that fake cancer products often use phrases like "treats all forms of cancer," "selectively kills cancer cells," or "more effective than chemotherapy." It also warns that these products may cause harm by delaying or interfering with proven treatments.
Talk with your care team
If you are thinking about mistletoe, bring it up with your care team. Tell them the product name and where you would get it. They can help you weigh it against your treatment plan. Ask whether a clinical trial could fit you if you want to try something new.
Sources
- NCI, Mistletoe Extracts (PDQ), Patient Version: https://www.cancer.gov/about-cancer/treatment/cam/patient/mistletoe-pdq
- FDA, Products Claiming to "Cure" Cancer Are a Cruel Deception: https://www.fda.gov/consumers/consumer-updates/products-claiming-cure-cancer-are-cruel-deception
Common questions
Is mistletoe approved to treat cancer in the U.S.?
No. NCI says the FDA has not approved mistletoe extract as a treatment for cancer or any other medical condition.
Do studies show it helps?
Results are mixed. NCI notes that some studies reported longer survival or better quality of life, while others found no benefit. For example, one trial in melanoma found no increase in survival time. Mixed results are not the same as proof that something works.
Does it have side effects?
Yes. NCI lists soreness and inflammation where the shot is given, headache, fever, chills, nausea, and feeling very tired. A few cases of severe allergic reactions, including anaphylactic shock, have been reported.
Can I use it along with my treatment?
Ask your care team first. They know your treatment and can help you weigh any possible risks.
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Sources last checked: 2026-09-27 what this meansLast updated: 2026-09-27Next planned review: 2027-03-27
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Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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