Unclear
Essiac tea
and Flor Essence herbal blends. Herbs & mushrooms.
- Verdict
- UnclearThere isn't enough human evidence to say either way.
- How sure
- Rung 1 · UnprovenLab or animal data only, or never directly tested in people.
The rung shows how sure the science is, not how big the effect is. How to read these ratings
Cancers affected
None shown
What the evidence shows
No clinical trial of Essiac has been reported in a peer-reviewed journal, and no results of human studies of Flor Essence have been reported. The National Cancer Institute says lab, animal and human studies haven't shown clear evidence of an anticancer effect.
What to do
Don't use it instead of treatment.
Sources
To take it to your doctor, print this page.
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Related
Every supplement we rated, or follow one cancer step by step: breast cancer, colorectal cancer, lung cancer and prostate cancer.