Reduced glutathione (GSH) is a well-characterized tripeptide-thiol reference material used in redox biochemistry, enzyme assays, oxidative-stress models, and GSH/GSSG measurement. This page explains the molecule’s research role and analytical context without making therapeutic claims.
Molecular identity
Reduced glutathione is a γ-glutamyl-cysteinyl-glycine tripeptide with a reactive cysteine thiol. It is commonly identified as GSH and is distinct from oxidized glutathione (GSSG), in which two GSH molecules form a disulfide. Researchers should specify the redox form, salt or counter-ion, purity method, and storage history when comparing standards or interpreting measurements.
Redox-buffering research
GSH participates in the cellular redox couple GSH/GSSG and is a substrate for glutathione peroxidase and glutathione-S-transferase systems. In cell-free work it can be used to test enzyme kinetics, peroxide reduction, thiol-disulfide exchange, and conjugation reactions. In cultured-cell studies, GSH measurements require careful control of extraction, oxidation during handling, normalization, and assay specificity.
Analytical questions
A useful research workflow distinguishes reduced and oxidized forms and documents the method used—such as HPLC, mass spectrometry, enzymatic recycling, or another validated assay. Researchers should account for pH, oxygen exposure, metal contamination, freeze-thaw history, and derivatization conditions because these can change the measured redox state. A catalog purity number does not replace an experiment-specific analytical control.
Research-only handling
Review the COA and SDS, protect the material from unsuitable environmental conditions, and follow institutional procedures for preparation and disposal. This page is educational research context only. The material is supplied for laboratory Research Use Only and is not for human or veterinary use, diagnosis, or treatment.
Every Glutathione order includes a sealed, lot-controlled vial, the completed lot documentation, and a handling & storage card. Product-specific handling follows the supplied documentation and institutional SOPs.
Evidence limits and research safety
Research findings can differ by model, assay, purity, formulation, and study design. Published cell, biochemical, and pre-clinical observations do not establish human or veterinary safety, efficacy, dosing, or suitability. Researchers should review the applicable SDS, institutional safety procedures, waste requirements, and lot-specific documentation before handling any reference material.
Related research
Credible sources
- PubChem — Glutathione
- PubMed — glutathione redox biochemistry
- PubMed — glutathione peroxidase and GST assays