L-Glutathione (500mg)

Why Buy L-Glutathione from Official Peptides

Official Peptides provides research-grade L-Glutathione at verified purity with full third-party documentation. We ship from the US with fast dispatch and maintain consistent inventory for research programs. Our transparent quality standards and competitive pricing make Official Peptides a reliable source for antioxidant research compounds.

L-Glutathione Research Profile

L-Glutathione (GSH) is the most abundant endogenous antioxidant tripeptide in mammalian cells, composed of glutamine, cysteine, and glycine. It plays critical roles in cellular redox homeostasis, detoxification of reactive oxygen species, and the regeneration of other antioxidants including vitamins C and E. Preclinical and clinical research has examined GSH in the context of oxidative stress, liver protection, immune function, and aging. It is also studied as a substrate and cofactor in numerous enzymatic reactions. For research use only.

Product Specifications

• Purity: ≥99% (HPLC verified)
• Format: Lyophilized powder
• Quantity: 500mg per vial
• Storage: Store at -20°C for long-term; 2-8°C for short-term use
• Shipping: USPS Priority Mail; ships within 1 business day

Frequently Asked Questions

Q: What is the difference between reduced (GSH) and oxidized (GSSG) glutathione?
A: L-Glutathione refers to the reduced form (GSH), which is the biologically active antioxidant species. When GSH neutralizes reactive oxygen species, it becomes oxidized glutathione (GSSG). The GSH:GSSG ratio is a widely used marker of cellular oxidative stress status in research. Official Peptides supplies the reduced form unless otherwise specified.

Q: Is L-Glutathione stable in solution?
A: Reduced glutathione is susceptible to oxidation in aqueous solution, particularly at neutral to alkaline pH and in the presence of oxygen. Research protocols typically prepare fresh GSH solutions immediately before use or store working solutions at acidic pH under inert atmosphere to preserve activity.

Q: How is L-Glutathione typically used in research settings?
A: L-Glutathione is used as a substrate in enzymatic assays, as a treatment compound in cellular oxidative stress models, as a reference standard in HPLC and mass spectrometry assays, and in reconstitution studies examining antioxidant pathway modulation.

Order L-Glutathione Online

Order research-grade L-Glutathione from Official Peptides today. Secure checkout, US-based shipping, and quality documentation on every order. Free shipping on orders over $150.

For Research Use Only. This compound is intended strictly for in vitro laboratory research by qualified scientists. Not for human consumption. Not FDA approved. Keep out of reach of children.