Glutathione
Last reviewed
Also known as: GSH, L-Glutathione, Gamma-Glutamylcysteinylglycine, Reduced Glutathione
Glutathione is the body's most important natural antioxidant, studied for detoxification, immune support, skin brightening, and protecting cells from oxidative damage throughout the body.
Glutathione is the body's master antioxidant — a tripeptide (glutamate-cysteine-glycine) present in every cell. It neutralizes reactive oxygen species, regenerates vitamins C and E, supports Phase II
⚠️ Educational only · Not medical advice · Consult a doctor · Most peptides are research-only / not FDA-approved for human use
§ AI Reference Summary
Glutathione (also known as GSH, L-Glutathione, Gamma-Glutamylcysteinylglycine, Reduced Glutathione) is a prominently researched experimental compound classified strictly within the Antioxidant framework. Operating primarily through advanced pharmacological pathways, its core mechanism of action is as follows: it glutathione is the body's master antioxidant — a tripeptide (glutamate-cysteine-glycine) present in every cell. It neutralizes reactive oxygen species, regenerates vitamins C and E, supports Phase II liver detoxification, and modulates immune cell function. Injectable GSH bypasses poor oral bioavailability. with a documented biological half-life of roughly 2 hours, In preclinical investigative trials and independent academic studies, researchers utilizing Glutathione have documented significant, quantifiable biological outcomes, primarily focusing on detoxification, antioxidant defense, immune support, skin brightening. Typical research protocols investigate administering 200000 to 600000mcg via subq pathways 2-3x/week. However, it is critically important to understand that while Glutathione demonstrates profound physiological potential in highly controlled laboratory settings, it remains classified strictly as a research chemical and has not been approved by the United States Food and Drug Administration (FDA) for human therapeutic, diagnostic, or dietary consumption. Independent chemical analysis via rigorous third-party Certificate of Analysis (COA) testing utilizing High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) remains the industry gold standard for verifying its base elemental stability when reconstituted appropriately in sterile bacteriostatic water.
§ Mechanism of Action
Glutathione is the body's master antioxidant — a tripeptide (glutamate-cysteine-glycine) present in every cell. It neutralizes reactive oxygen species, regenerates vitamins C and E, supports Phase II liver detoxification, and modulates immune cell function. Injectable GSH bypasses poor oral bioavailability.
§ Primary Benefits
- 1Detoxification
- 2antioxidant defense
- 3immune support
- 4skin brightening
§ Clinical Evidence
Glutathione: overview of biosynthesis, regulation, and clinical role
Forman et al. (Mol. Aspects Med.): Comprehensive review of glutathione's role in redox signaling, detoxification, and its depletion in disease states including Parkinson's, liver disease, and cancer.
StrongGlutathione and immune function
Dröge & Breitkreutz (Proc. Nutr. Soc.): Review demonstrating glutathione's critical role in lymphocyte proliferation, NK cell activity, and overall immune defense.
ModerateGlutathione for skin lightening: randomized controlled trial
Weschawalit et al. (Clin. Cosmet. Investig. Dermatol.): RCT showing oral glutathione supplementation significantly reduces melanin index and improves skin elasticity and wrinkles.
ModerateGlutathione depletion in Parkinson's disease substantia nigra
Sian et al.: Early landmark study demonstrating reduced glutathione levels as one of the earliest biochemical changes in Parkinson's disease pathology.
StrongUSP10 from Human Umbilical Cord Mesenchymal Stem Cells-Derived Extracellular Vesicles Mediates SCL7A11 Deubiquitination in Epithelial Cells: A Key to Anti-ferroptosis and Anti-fibrosis in Pulmonary Fibrosis.
A 2026 study found that extracellular vesicles from human umbilical cord mesenchymal stem cells reduced pulmonary fibrosis and ferroptosis in a mouse model. Researchers demonstrated this effect was driven by USP10-mediated deubiquitination and stabilization of the SLC7A11 protein.
PreclinicalEffects and mechanisms of NAD + on lung injury after cardiac arrest and cardiopulmonary resuscitation in swine.
A 2026 study demonstrated that NAD+ administration significantly attenuated lung injury following cardiac arrest and resuscitation in a swine model. Researchers found this effect was likely mediated by suppressing ferroptosis through the modulation of the YAP/ACSL4 signaling pathway.
PreclinicalCombating Cadmium-Induced Neurotoxicity, Oxidative Stress, and Inflammatory Pathways Using DOPA-31, a Dioxopiperidinamide Derivative in an In Vivo Zebrafish Model.
A 2026 preclinical study demonstrated that DOPA-31 mitigated cadmium-induced neurotoxicity in a zebrafish model by reducing oxidative stress and downregulating pro-inflammatory markers. Researchers found the derivative improved motor and cognitive functions while upregulating neuroprotective factors and reducing neuronal damage.
PreclinicalVaccarin Improves Myocardial Ischemia-Reperfusion Injury by Attenuating Oxidative Stress and Ferroptosis Through Reducing NOX4-Modulated JAK2/STAT3 Pathway Activation.
In a 2026 preclinical study, researchers demonstrated that vaccarin alleviated myocardial ischemia-reperfusion injury in mouse and cellular models. The findings indicated that vaccarin suppressed oxidative stress and ferroptosis by inhibiting the NOX4-driven JAK2/STAT3 signaling pathway.
PreclinicalZFP36L1 Enhances Microglial Ferroptosis in Ischemic Stroke by Reducing FTO-Mediated N6-Methyladenosine Demethylation of ACSL1 mRNA.
A 2026 study demonstrated that ZFP36L1 promotes microglial ferroptosis and neuroinflammation during ischemic stroke by reducing FTO mRNA stability and increasing ACSL1 expression. Researchers found that silencing ZFP36L1 successfully alleviated cerebral ischemic injury in mouse models.
PreclinicalFerroptosis in Breast Cancer: Molecular Insights and Therapeutic Strategies.
Targeting ferroptosis exploits metabolic vulnerabilities in breast cancer subtypes and influences the tumor microenvironment, a 2026 review found. The research demonstrated that this iron-dependent cell death mechanism provides a potential strategy to address drug-resistant cancer stem cells.
Emerging§ Safety Profile
Excellent safety profile. Used clinically for decades. IV and SubQ routes well-tolerated. Rare allergic reactions possible. May reduce effectiveness of some chemotherapy drugs — avoid during cancer treatment without oncologist approval.
See our evidence grading methodology for how we evaluate and grade peptide safety data.
§ Dosing Protocol
⚠️ For educational purposes only. Not medical advice. Consult a healthcare professional before using any peptide.
RouteSubQ
Dose Range200000–600000 mcg
Frequency2-3x/week
TimingMorning
Cycle Length4–12 weeks
BAC Water3 ml / 1500mg vial
SubQ: 200-600mg. IV push: 600-2000mg. For skin brightening, consistent dosing over 8-12 weeks is needed. Often combined with Vitamin C for synergistic antioxidant effect.
§ Pharmacokinetics
⏱️ Half-Life: 2h
Plasma concentration over time§ Expected Outcomes
Week 1
Improved energy and reduced oxidative stress markers
Weeks 2–4
Skin brightening begins; improved liver function markers
Month 2–3
Noticeable skin lightening effect; improved immune markers; better hangover recovery
Long-term
Sustained antioxidant protection; potential neuroprotective benefits
§ Adverse Effects
| Side Effect | Incidence | Severity |
|---|---|---|
Injection site redness | ~5% of users | mild |
Mild bloating (oral) | ~8% of users | mild |
Rare allergic reaction | <1% of users | rare |
Where to Source Glutathione for Research
Finding verified, high-purity Glutathione requires rigorous COA verification. We independently evaluate vendors based on third-party HPLC testing, purity thresholds (≥98%), and batch-specific documentation.
View COA-Verified Glutathione✓ Third-party tested·✓ US shipping·✓ COA on every batch
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§ About the Author
Dr. E. Vance
Editorial Director, PeptiDex
Dr. E. Vance is the Editorial Director at PeptiDex and leads the platform's editorial division, ensuring that every published research summary meets rigorous preclinical citation standards. With a Ph.D. in Molecular Pharmacology from Columbia Univers...
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⚠ Educational only · Not medical advice · Most peptides are research-only / not FDA-approved