Glutathione

Glutathione - Reduced L-Glutathione (GSH) Research Compound

Glutathione (GSH) is a tripeptide of glutamate, cysteine, and glycine - the most abundant endogenous antioxidant in mammalian cells. It is the master thiol in the body’s redox system and sits at the center of detoxification, oxidative-stress buffering, and mitochondrial function. In the research-peptide toolkit, reduced L-glutathione is the reference antioxidant compound: it is what other antioxidants are measured against, and its cellular concentration is the standard readout for “redox status” in oxidative-stress research.

Why the Reduced (GSH) Form Matters

Glutathione cycles between two forms: reduced (GSH, active) and oxidized (GSSG, inactive). The GSH:GSSG ratio is the most-cited single indicator of cellular redox state in the published literature. When researchers supply exogenous glutathione, the reduced form is what matters - GSSG cannot accept additional electrons until it is recycled. The research interest is in supplying the active form directly so that downstream antioxidant enzymes (glutathione peroxidase, glutathione-S-transferase) can continue running without being substrate-limited.

Research Applications

Glutathione is used in studies examining:

• Cellular redox balance and GSH:GSSG ratio endpoints
• Liver detoxification and Phase II conjugation research
• Mitochondrial oxidative-stress models
• Neurological oxidative-stress endpoints (Parkinson’s, ALS models)
• Dermatology research - tyrosinase inhibition and pigmentation endpoints
• Paired antioxidant research (with vitamin C, alpha-lipoic acid, NAC)

Specifications

Storage & Handling

Unopened vials are kept at 2-8°C under standard cold-chain conditions and remain stable for 12+ months. Reconstitution parameters, solvent compatibility, and post-reconstitution stability for Glutathione are documented in the published peer-reviewed literature and standard peptide-chemistry references.

Reference Literature

Published clinical and preclinical Glutathione literature is available through PubMed, Google Scholar, and other peer-reviewed databases. WWP does not provide protocol design, dosing guidance, or administration parameters. Those decisions rest with the researcher and any applicable institutional review board.

Common Questions About Glutathione Research

What is glutathione used for in research?

It is studied primarily as the reference endogenous antioxidant. Published work covers redox-balance endpoints (GSH:GSSG ratio), liver Phase II detoxification, mitochondrial oxidative-stress buffering, neurological oxidative-stress models, and dermatological pigmentation research via its tyrosinase-inhibition signal.

What is the difference between GSH and GSSG?

GSH is the reduced (active) form of glutathione. GSSG is the oxidized (inactive) form - two GSH molecules linked by a disulfide bridge. The GSH:GSSG ratio is the single most-cited indicator of cellular redox status. Only the GSH form can donate electrons to neutralize reactive oxygen species, which is why research-grade glutathione is supplied in the reduced form.

How is glutathione delivered in research protocols?

Oral glutathione is poorly bioavailable because it is hydrolyzed by gut peptidases. Published research protocols use intravenous, subcutaneous, or intramuscular administration to bypass first-pass breakdown. Liposomal oral formulations are a separate research category with different pharmacokinetics.

Is glutathione FDA approved?

Reduced L-glutathione is listed in the USP and appears as a component in some compounded and intravenous preparations, but injectable glutathione is not FDA approved as a standalone drug. Every vial WWP ships is labeled and sold strictly for laboratory and research use only.

How is glutathione stored?

Unopened vials are stored at 2-8°C and stay stable for 12+ months. Glutathione in solution is more sensitive to oxidation than most peptides - keep reconstituted solution at 2-8°C, protect from light, and use within 14-21 days.

Purity Guarantee

Every batch is ≥99% purity. Send us a COA from any independent test and we’ll issue store credit regardless of what it shows.