Glutathione 1,500mg (Single Vial)
Glutathione is the body's master antioxidant, central to detoxification, immune function and oxidative-stress research. Supplied lyophilized for stability.
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Product Details
| Purity | ≥99% (LC-MS verified) |
| Form | Lyophilized powder, preservative free |
| Storage | Cool and dry; refrigerate after reconstitution |
| Batch | COA available on request |
Why Choose Glutathione 1,500mg (Single Vial)?
Glutathione is the body's master antioxidant, central to detoxification, immune function and oxidative-stress research. Supplied lyophilized for stability.
Key Benefits
- Master antioxidant — detox and immune research
- Third-party tested — COA available on request
- Lyophilized, preservative free
- Ships from the USA in discreet packaging
About Glutathione 1,500mg (Single Vial)
Glutathione is a tripeptide — glutamate, cysteine and glycine — and the most abundant intracellular antioxidant in mammalian cells. Its function depends on the thiol group of its cysteine residue, which donates electrons to neutralise reactive oxygen species.
Unusually among peptides, its bond structure is atypical: the glutamate is joined through its side-chain carboxyl rather than the usual alpha-carboxyl, which makes it resistant to most peptidases and contributes to its intracellular stability.
Supplied as lyophilized powder for laboratory research. Not for human consumption.
Research background
Redox buffering
Glutathione cycles between reduced (GSH) and oxidised (GSSG) forms. The ratio between them is one of the standard measures of cellular oxidative state and is used as an endpoint across a very wide range of studies.
Detoxification pathways
Glutathione S-transferases conjugate glutathione to electrophilic compounds, making them water-soluble for excretion. This is a principal route by which cells handle xenobiotics and reactive metabolites.
Enzymatic antioxidant systems
Glutathione peroxidases use it as the reducing substrate to break down hydrogen peroxide and lipid peroxides, forming one of the main enzymatic defences against oxidative damage.
Synthesis and precursor availability
Cellular glutathione is limited chiefly by cysteine availability, which is why much of the applied literature concerns precursor supply rather than glutathione administration itself.
Glutathione is studied extensively across biochemistry and cell biology. Material supplied here is a research reagent, not an approved medicine.
Reconstitution
- Equilibrate firstAllow the vial to reach room temperature before opening. Introducing solvent into a cold vial promotes condensation, which affects both concentration accuracy and stability.
- Select the diluentBacteriostatic water — sterile water with 0.9% benzyl alcohol — is standard where the solution will be held for more than a few days. Plain sterile water is appropriate only for single-session use with no storage.
- Add slowly, down the wallDirect the solvent against the inner wall of the vial rather than onto the powder. A stream striking the lyophilized cake causes localized shear that can denature peptide chains.
- Do not shakeSwirl gently, or simply let the vial stand. Agitation introduces air and mechanical stress, and both degrade peptides. Full dissolution usually takes a minute or two.
- Inspect before useA correctly reconstituted solution is clear and colourless. Cloudiness, visible particulate or discolouration indicates a problem with the material or the diluent.
Concentration is set by the volume of diluent added. For a 1500mg vial, 5mL of bacteriostatic water yields 300mg/mL. Calculate the working concentration your protocol requires rather than following a generic figure.
Storage and stability
| State | Temperature | Practical shelf life |
|---|---|---|
| Lyophilized, sealed | −20 °C | 24+ months |
| Lyophilized, sealed | 2–8 °C | ~12 months |
| Lyophilized, sealed | Room temperature | Weeks — transit only |
| Reconstituted, bacteriostatic water | 2–8 °C | ~3–4 weeks |
| Reconstituted, sterile water | 2–8 °C | Same session |
Lyophilized peptide is stable enough to survive shipping at ambient temperature, which is why cold-chain courier service is not required for transit. Long-term storage is a different matter — material intended to be held for months belongs in a freezer.
Protect from light, and avoid repeated freeze-thaw cycles. Each cycle causes measurable degradation, so dividing a reconstituted stock into single-use aliquots before freezing is preferable to thawing and refreezing one vial repeatedly.
Purity and verification
Every lot is tested by an independent laboratory using two orthogonal methods. HPLC (high-performance liquid chromatography) establishes purity as a percentage of total peptide content, separating the target compound from truncated sequences and synthesis by-products. LC-MS (liquid chromatography–mass spectrometry) confirms molecular identity by mass.
Both matter. Purity alone is insufficient — a 99% pure sample of the wrong compound is still the wrong compound. Together the two tests establish identity and quality, which is why Glutathione is released only after both pass.
The certificate of analysis references the lot number printed on your vial label. Request the COA for your lot at sales@pepsdepot.com.
Published research
Peer-reviewed studies indexed in PubMed. Each links to the abstract and, where a free copy exists, to the full text. We link primary sources rather than summarising them second-hand.
Glutathione in Skin Aging and Tissue Regeneration: A Systematic Review of Molecular Mechanisms, Redox Modulation, and Biomedical Implications
Exploring the Safety and Efficacy of Glutathione Supplementation for Skin Lightening: A Narrative Review
Glutathione in Our Diet and Its Role in the Body: From Disease Prevention to Anti-Aging
Frequently asked questions
Is glutathione a peptide?
How do you reconstitute glutathione?
Why does glutathione solution sometimes smell sulphurous?
Does this need refrigerated shipping?
Is a certificate of analysis available?
Is Glutathione approved for human use?
Customer reviews
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