Glutathione (GSH)
L-Glutathione | Master Antioxidant Tripeptide
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Glutathione is the body's master antioxidant, a tripeptide produced naturally by the liver. It protects cells against free radicals, peroxides, and heavy metals while eliminating toxins including drugs and pollutants. Injectable glutathione bypasses gastrointestinal breakdown for superior bioavailability compared to oral supplements. Research supports benefits for neurological health, immune function, skin health, and anti-aging.
Glutathione acts as the primary intracellular antioxidant, directly neutralizing reactive oxygen species and regenerating other antioxidants like vitamins C and E. It plays crucial roles in detoxification by conjugating with toxins for elimination, supports immune function through T-cell regulation, protects mitochondria, and maintains cellular redox balance. The thiol group of cysteine provides its antioxidant activity.
Molecular Data
?ECGγ
Position 1
Glutamic Acid
Position 2
Cysteine
Position 3
Glycine
Position 4
Research Indications
Primary cellular antioxidant that neutralizes free radicals and protects against oxidative damage.
Binds and facilitates elimination of heavy metals and environmental toxins.
Essential for hepatic detoxification pathways and liver protection.
IV glutathione showed improvements in mental function and speech quality in case studies.
Protects neurons against oxidative damage and supports brain health.
Improved Th1 cytokines and immune markers in HIV patients with supplementation.
Supports skin health with potential brightening effects through melanin modulation.
Combats age-related oxidative stress and supports cellular longevity.
Dosing Protocols
Injectable glutathione is the most effective delivery method, bypassing GI breakdown for direct absorption. Subcutaneous injections are typically administered 2-3 times weekly. IV administration is fastest-acting but requires clinical supervision. Start with lower doses to assess tolerance.
| Goal | Dose | Frequency | Route |
|---|---|---|---|
| General wellness | 100-200 mg | 2-3x weekly | SubQ |
| Intensive therapy | 200-600 mg | 2-3x weekly | SubQ or IV |
| Detoxification | 600-1000 mg | Weekly IV | IV (clinical) |
| Parkinson's support | 1400 mg | 2-3x weekly | IV (clinical) |
Reconstitution Instructions
- Bacteriostatic water or sterile saline
- Insulin syringes
- Alcohol swabs
- Peptide vial
- Sterile work surface
- 1 Clean work area and hands thoroughly
- 2 Calculate required water volume
- 3 Draw diluent into syringe
- 4 Inject slowly into vial
- 5 Gently swirl until dissolved (never shake)
- 6 Store in refrigerator, protect from light
Interactions
What to Expect
Side Effects & Safety
Common Side Effects
- Injection site reactions
- Mild nausea (usually with higher doses)
- Abdominal cramping
Stop Signs - Discontinue if:
- Signs of allergic reaction (rash, difficulty breathing)
- Severe abdominal pain
- Signs of zinc deficiency
Contraindications
- Known allergy to glutathione
- Pregnancy or breastfeeding (insufficient safety data)
- Asthma (may trigger bronchospasm in some)
Quality Checklist
Good Signs
- White to off-white lyophilized powder
- Clear solution after reconstitution
- Reduced (not oxidized) form
- Intact vacuum seal
Warning Signs
- Slight yellowing may indicate oxidation
Bad Signs
- Dark yellow or brown coloration
- Cloudy solution
- Strong sulfur odor (beyond mild)
References
- Randomized, double-blind, pilot evaluation of intravenous glutathione in Parkinson's diseaseHauser RA, Lyons KE, McClain T, Carter S, Perlmutter DMovement Disorders (2009)
21 PD subjects randomized to IV glutathione 1,400 mg or placebo 3x weekly for 4 weeks. Well tolerated with no safety concerns. Preliminary data suggested possibility of mild symptomatic effect.
- Liposomal Glutathione Supplementation Restores TH1 Cytokine Response to Mycobacterium tuberculosis Infection in HIV-Infected IndividualsLy J, Lagman M, Saing T, Singh MK, Tudella EV, Morris D, Anderson J, Daliva J, Ochoa C, Patel N, Venketaraman VJournal of Interferon & Cytokine Research (2015)
13-week liposomal glutathione supplementation in HIV-infected individuals resulted in significant increases in plasma Th1 cytokines IL-12 and IFN-γ, restoring immune response.
- Exploring the Safety and Efficacy of Glutathione Supplementation for Skin Lightening: A Narrative ReviewVariousCureus (2025)
Narrative review concluding glutathione has potential as a depigmenting agent. Oral supplementation shows significant but variable melanin reduction. IV use associated with safety concerns including anaphylaxis.
- Glutathione metabolism and its implications for healthWu G, Fang YZ, Yang S, Lupton JR, Turner NDJournal of Nutrition (2004)
Comprehensive review establishing glutathione's roles in antioxidant defense, nutrient metabolism, regulation of gene expression, DNA/protein synthesis, cell proliferation and apoptosis, immune response, and protein glutathionylation.
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Disclaimer
This information is for educational and research purposes only. Consult a healthcare professional before use.