Rung Five
Supplements
Unclear

Glutathione

glutathione pills. Longevity & fitness.

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 studied

What the evidence shows

Not tested for cancer. In a randomized trial of 40 healthy adults, 500 mg of glutathione twice a day for four weeks didn't change glutathione levels in the blood or markers of oxidative stress.

What to do

No evidence it helps with cancer, and pills may not raise the body's own glutathione. Ask your care team before taking any antioxidant during treatment.

Sources

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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.