Oxidative Stress Studies
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L-Glutathione is a peptide made of three amino acids. It is the most common antioxidant found inside mammalian cells. It cycles between two forms, and the ratio between them is a standard way to measure oxidative stress. Studies have examined that ratio, along with its role in detoxification reactions. One of its chemical bonds is built differently from a normal peptide bond. That is why most enzymes cannot break it apart.
Thiol-containing tripeptide (Glu-Cys-Gly)
The pathways L-Glutathione acts on — and what each one does. Signalling pathways studied in preclinical models · illustrative.
L-Glutathione (GSH) is a thiol-containing tripeptide that acts directly as an antioxidant, neutralizing reactive oxygen species, free radicals, peroxides, and lipid peroxides. The reactive cysteine thiol group donates electrons to stabilize oxidative species.
GSH is the essential co-substrate for the glutathione peroxidase (GPx) family — including GPx4, which converts toxic lipid peroxides into non-toxic alcohols and is central to ferroptosis research — and for glutathione S-transferases (GST).
The GSH:GSSG (reduced:oxidized) couple is the principal buffer of intracellular redox state. GSH also conjugates electrophilic xenobiotics for elimination and has been linked to activation of the Nrf2/HO-1 cytoprotective pathway.
The main areas L-Glutathione is being studied for — and the study-reported figures behind them.
GSH is the central reference antioxidant for studying redox signaling, free-radical chemistry, and cellular oxidative-stress responses.
Frontiers Pharmacol. 2014
As the GPx4 cofactor, glutathione is a key node in ferroptosis research — the iron-dependent, lipid-peroxidation form of regulated cell death.
Cell Death & Disease 2023
In vitro studies report glutathione protects cells from oxidative cytotoxicity in part by activating the Nrf2/HO-1 antioxidant-response pathway.
Lee et al. 2019
Glutathione is studied as the principal substrate of the GST detoxification system and the master buffer of intracellular redox state.
Rai R. 2021
Representative figures from published research. Bars fill as you scroll.
Figures are representative of published research findings and shown for reference.
Every batch of L-Glutathione is sent to an accredited independent laboratory before it ships. Here is what we screen for.
| Chemical Name | L-Glutathione (reduced, GSH) |
|---|---|
| Sequence | γ-L-Glutamyl-L-Cysteinyl-Glycine |
| Molecular Weight | 307.32 g/mol |
| Molecular Formula | C₁₀H₁₇N₃O₆S |
| Content | 1500 mg per vial |
| Form | Lyophilized powder |
| Purity | ≥99% (HPLC verified) |
| Testing | Third-party HPLC, Mass Spec, Endotoxin |
| Storage | -20°C for long-term stability |
| Solubility | Water-soluble |
| COA | Included with every order |
L-Glutathione (GSH) is a tripeptide composed of glutamate, cysteine, and glycine. It is the most abundant intracellular antioxidant in human cells and is often called the "master antioxidant" for its central role in redox homeostasis, enzymatic detoxification, and protection against oxidative damage.
Glutathione works in two ways: directly, by using its reactive cysteine thiol group to neutralize free radicals and peroxides; and indirectly, as the essential co-substrate for glutathione peroxidase (GPx) and glutathione S-transferase (GST) enzymes that detoxify hydrogen peroxide, lipid peroxides, and electrophilic compounds.
The GSH:GSSG ratio compares reduced glutathione (GSH) to its oxidized disulfide form (GSSG). In healthy cells this ratio is high — roughly 100:1 — and it serves as a key indicator of cellular redox status. A falling ratio is widely used in research as a marker of oxidative stress.
Reduced glutathione (GSH) is the active antioxidant form with a free thiol group. When it neutralizes an oxidant, two GSH molecules join to form oxidized glutathione (GSSG). The enzyme glutathione reductase regenerates GSH from GSSG, keeping the antioxidant pool replenished.
Research-grade glutathione is used to study oxidative stress and antioxidant defense, ferroptosis and lipid peroxidation (via GPx4), xenobiotic detoxification, the Nrf2/HO-1 cytoprotective pathway, and redox involvement in models of aging and neurodegeneration.
Lyophilized L-Glutathione should be stored at -20°C, protected from light and moisture. Reduced glutathione oxidizes readily in solution, so the lyophilized material is the stable form for storage.
Independent published research indexed from PubMed and peer-reviewed journals — not Zorva Lab claims.
For Research Use Only.
Not for human or veterinary use. For in-vitro laboratory research only. These statements have not been evaluated by the FDA; this product is not intended to diagnose, treat, cure, or prevent any disease. Sold exclusively to qualified researchers and institutions.
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