Overview
Master intracellular antioxidant; oral bioavailability depends on form.
- Asparagus
- Avocado
- Spinach
- Liposomal
- S-acetyl-glutathione
- Reduced GSH
Forms & variants of Glutathione
Different chemical forms of Glutathione behave differently. Browse each form's mechanism, bioavailability, and best-use context.
Mechanism of action
Reduces ROS via glutathione peroxidase; conjugates xenobiotics in Phase II.
- · Phase II conjugation
- · Redox cycling
Effects on the body
Organ system effects
Conjugates electrophilic drugs/toxins.
May lighten skin in IV protocols (controversial).
Evidence-based benefits
Raises blood GSH with liposomal/S-acetyl
Moderate evidenceImproves NAFLD markers
Limited evidencePotential side effects
- · GI upset
Drug interactions
Supplement interactions
- NAC + GlycineCheaper precursors that raise GSH similarly.
No specific avoidances listed.
Dosing & bioavailability
Where to buy
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Third-party testedIndependently verified Glutathione — look for USP, NSF, or Informed Sport seals on the label for purity and dose accuracy.Glutathione third party tested NSF
CapsulesPre-measured Glutathione capsules — easiest for travel and consistent daily dosing without scoops or scales.Glutathione capsules
PowderBulk unflavored Glutathione powder — best cost-per-gram and flexible dosing for stacking or mixing into drinks.Glutathione powder unflavored
Best sellersMost-purchased Glutathione products on Amazon — a quick way to see what's reviewed widely before you commit.Glutathione best sellerScientific evidence9Show studiesHide studies
Glutathione: pharmacology, clinical evidence, and safety — narrative review
Examine.com Research Team
Curated narrative review of human and preclinical evidence for Glutathione, including mechanism, typical dosing, and safety considerations.
Best-supported outcome: Raises blood GSH with liposomal/S-acetyl (evidence: moderate). Additional outcomes and limitations summarized in the full profile.
PubMed: Glutathione — Raises blood GSH with liposomal/S-acetyl
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PubMed: Glutathione — Improves NAFLD markers
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PubMed: Glutathione — randomized controlled trial
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PubMed: Glutathione — meta-analysis
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PubMed: Glutathione — pharmacokinetics
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PubMed: Glutathione — safety adverse events
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PubMed: Glutathione — dose response
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Google Scholar: Glutathione — clinical evidence
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Cross-database citation index for Glutathione as it relates to "clinical evidence".
Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.