Unclear
Black seed oil
Nigella sativa, black cumin. Herbs & spices.
Safety: At high doses it slowed liver enzymes that clear many drugs, which could affect chemotherapy. Kidney injury has been reported with tablets.
- 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 proven
What the evidence shows
Its compound thymoquinone slows cancer cells in lab and animal studies. Human cancer data are limited to small reports of its use alongside childhood leukemia treatment, with no proof it fights cancer.
What to do
Don't take it during cancer treatment without your oncologist's approval.
Sources
To take it to your doctor, print this page.
Related
Every food we rated, or follow one cancer step by step: breast cancer, colorectal cancer, lung cancer and prostate cancer.