Glutathione, commonly abbreviated as GSH and also known as γ-L-Glutamyl-L-Cysteinyl-Glycine, is a naturally occurring intracellular tripeptide widely distributed in nearly all eukaryotic and prokaryotic cells. Distinct from ordinary linear peptides linked by standard alpha peptide bonds, the glutamate residue connects to cysteine through a gamma peptide linkage. This special chemical bond renders GSH resistant to most common peptidases, enabling it to remain stable inside living cells and serve as the primary non-enzymatic thiol buffer system. It exists in two interconvertible forms within biological systems: reduced glutathione (GSH) with an active free thiol group, and oxidized glutathione (GSSG), formed when two GSH molecules couple via disulfide bond. The GSH/GSSG ratio is universally recognized as the core biomarker for cellular redox status, which reflects the oxidative stress level of tissues and cell lines.

The reactive thiol (-SH) group on cysteine residue is the functional core of GSH. This active group enables GSH to directly scavenge reactive oxygen species, free radicals, peroxides and electrophilic toxic metabolites. It participates in intracellular detoxification processes by chelating heavy metal ions such as mercury, lead and arsenic, conjugating exogenous toxins, carcinogens and drug metabolites, and facilitating their excretion out of cells. Moreover, glutathione acts as a critical cofactor for multiple antioxidant enzymes including glutathione peroxidase and glutathione S-transferase. It can regenerate other antioxidant molecules such as vitamin C and vitamin E, forming an integrated endogenous antioxidant defense network that protects cell membranes, proteins and DNA from oxidative damage.

In laboratory research scenarios, GSH covers an extensive array of research fields. Redox biologists utilize it to construct oxidative stress cell models and explore redox signaling pathways. Liver-related research investigates its cytoprotective effect against drug-induced hepatotoxicity. Immunology studies focus on its function in maintaining lymphocyte proliferation and immune cell activity. Researchers also deploy GSH in cell culture, oxidative injury models, heavy metal toxicity assays, aging-related oxidative damage experiments and enzyme kinetic research. Unlike many synthetic research peptides, glutathione is endogenous, which allows it to simulate native physiological environments with minimal non-specific interference.

Our Glutathione is produced via advanced fermentation or solid-phase peptide synthesis routes. The crude product undergoes multiple purification procedures including decolorization, ion exchange chromatography and reversed-phase preparative HPLC, effectively removing residual amino acids, peptide fragments and inorganic impurities. Every batch undergoes full quality control testing, including HPLC purity assay, mass spectrometry structural confirmation, moisture detection and appearance inspection. Complete COA, HPLC chromatogram and mass spectrum documents can be provided for each shipment to satisfy strict laboratory documentation and audit requirements. Since GSH powder is highly hygroscopic and susceptible to oxidation upon exposure to oxygen and moisture, the finished product is packaged under nitrogen blanketing to minimize oxidative degradation during transportation and storage. This product is widely supplied to university laboratories, biotech R&D institutes and pharmaceutical preclinical research teams for redox mechanism exploration, cell oxidative stress models, toxicology research, liver protection studies and biochemical enzyme experiments.