Quick Facts
Overview
Glutathione (GSH) is a tripeptide composed of glutamate, cysteine, and glycine, joined by an unusual gamma-peptide bond. It is the most abundant intracellular antioxidant in the human body, present in virtually every cell at millimolar concentrations. Glutathione plays a central role in antioxidant defense, detoxification (Phase II conjugation), immune function, and cellular redox signaling. Levels decline significantly with age, chronic illness, toxin exposure, and oxidative stress, which has made glutathione supplementation and repletion a major focus of anti-aging and integrative medicine research. With over 1,000 published studies, glutathione is one of the most extensively researched molecules in biochemistry. While technically a tripeptide rather than a traditional research peptide, it is widely offered by peptide suppliers due to its overlapping research applications and injectable formulation availability.
Mechanism of Action
Glutathione functions through multiple interconnected mechanisms. As a direct antioxidant, it neutralizes reactive oxygen species (ROS) and reactive nitrogen species (RNS), protecting cellular structures from oxidative damage. As a cofactor for glutathione peroxidase and glutathione S-transferase enzymes, it catalyzes the detoxification of peroxides, electrophiles, and xenobiotics (Phase II detoxification). Glutathione maintains the reduced state of other antioxidants including vitamins C and E, recycling them back to their active forms. It regulates the cellular redox state (GSH/GSSG ratio), which acts as a master switch for gene expression, immune cell activation, and apoptotic signaling. In immune function, glutathione is essential for lymphocyte proliferation, natural killer cell activity, and T-cell function.
Research Applications
Antioxidant defense and oxidative stress research, detoxification and liver support, immune function optimization, skin brightening and anti-aging, neurodegenerative disease research (Parkinson's), chronic illness and toxin exposure support, athletic recovery and performance, mitochondrial protection
Research Protocols
Protocol Reference
Safety Profile and Considerations
Naturally occurring endogenous tripeptide present in every cell. Injectable glutathione is generally well-tolerated. Oral bioavailability is limited due to GI degradation (liposomal forms improve absorption). IV administration provides direct systemic delivery. Very rare adverse reactions reported. Widely used in integrative medicine under physician supervision.
Storage and Stability
Lyophilized/powder: -20C, protect from moisture and light. Reconstituted: 2-8C, use promptly (oxidation-sensitive). See our storage and handling guide for comprehensive best practices.
Published Research
Search for additional Glutathione research on PubMed.
Where to Source Glutathione
Peptide purity is critical for research accuracy. We evaluate suppliers against our 100-point methodology.
Glutathione from Elara Research Peptides
Elara Research Peptides carries Glutathione with batch-specific Certificates of Analysis from independent third-party laboratories. Every product verified at 99%+ purity via HPLC and mass spectrometry.
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