Tripeptide antioxidant · Fact sheet
Glutathione
Also known as GSH · Reduced glutathione
Glutathione is an antioxidant made by the body. Small oral studies measured glutathione stores and skin pigmentation, but they do not establish broad detox, anti-aging, or disease-prevention benefits.
What is Glutathione?
Glutathione is made from three amino acids and participates in cellular antioxidant systems. Different forms and routes are not interchangeable evidence.
Benefits people look for
Skin appearance, energy, immune support, and detox claims are common interests. An increase in an antioxidant biomarker is not the same as a demonstrated health improvement.
What the evidence supports
- Oral supplementation increased measured glutathione stores in one randomized study.
- Pigmentation differences in the small skin trial were significant at only two of six measured sites. Broad wellness benefits remain unproven.
All research areas
- Glutathione stores
- Skin pigmentation
- Oxidative-stress biomarkers
Anecdotal reports & lived experiences
Reports describe what someone noticed. They cannot establish cause, typical results, or how often a side effect happens.
Acute illness in a contaminated-product investigation
FDA described nausea, vomiting, chills and other symptoms in a seven-patient report; one person developed low blood pressure and breathing difficulty and was hospitalized.
FDA testing found excessive endotoxin in the investigated material. This is a product-contamination signal and cannot be generalized to oral glutathione.
Read the FDA investigation ↗Side effects & risks
- Small oral trials provide limited information about uncommon or long-term adverse effects.
- FDA documented adverse events linked to endotoxin-contaminated compounded sterile products; oral findings cannot establish injectable safety.
This is a summary of the cited evidence, not a complete product label. A lack of human safety data does not establish safety.
Clinical research: how strong is it?
Early human evidenceA 54-person trial measured glutathione stores over six months. A separate 60-person, four-week skin study found small and uneven pigmentation changes; neither establishes durable clinical wellness benefits.
Selected research to read
54-adult randomized trial measuring biomarkers, not disease prevention.
60-person, four-week trial with site-dependent results.
FDA approval & research status
Glutathione has no FDA-approved drug indication for the wellness uses discussed here. Supplement availability is not premarket FDA approval of effectiveness or safety.
No FDA-approved use is documented in the records summarized on this page.
Supplement research is not FDA drug approval
Glutathione has no FDA-approved drug indication for the wellness uses discussed here. Supplement availability is not premarket FDA approval of effectiveness or safety.
This summarizes the cited product or research record. Trial phases do not establish successful completion of earlier stages, and a stopped program is not ongoing development. Approval applies only to the labeled product, use and population.
What we still don’t know
- Meaningful effects beyond antioxidant measurements
- Durability of skin changes
- Long-term safety and comparability across routes
The takeaway
Pigmentation differences in the small skin trial were significant at only two of six measured sites. Broad wellness benefits remain unproven.
Sources & further reading
Medical evidence and regulatory sources are listed here. Personal reports are linked separately in the experiences section.
- 1pubmedOral glutathione and body stores
54-adult randomized trial measuring biomarkers, not disease prevention.
- 2
- 3fdaFDA: glutathione sterile-product safety concerns
Adverse-event investigation involving contaminated compounded products.
- 4fdaFDA: what approval means for supplements
Dietary supplements are not approved by FDA for safety and effectiveness before marketing.