Also known as GSH · γ-Glu-Cys-Gly · reduced glutathione
The body’s master antioxidant — a tripeptide (γ-Glu-Cys-Gly) sold as an injectable for antioxidant, detox, and skin-related use.
Research refreshed
Glutathione is the cell’s principal antioxidant: a tripeptide of glutamate, cysteine, and glycine that neutralizes reactive oxygen species and supports detoxification. It is one of the few genuine peptides in the antioxidant/cofactor group of this catalog, though it is usually thought of as a metabolite rather than a "peptide drug." On the grey market it is sold as an injectable and IV additive for antioxidant support, detoxification, and — especially — skin brightening, a popular use for which the evidence is weak.
Glutathione (GSH) is ubiquitous and essential — present in nearly every cell as the main line of defense against oxidative damage. Structurally it is a small tripeptide with one unusual feature: its glutamate is joined through its side-chain (γ) carboxyl rather than the normal backbone linkage, which protects it from ordinary peptidases. Its business end is the cysteine thiol, which donates electrons to quench reactive oxygen species and then recycles between reduced (GSH) and oxidized (GSSG) states.
Because oxidative stress and declining glutathione are themes in aging and disease, it is widely sold — as oral, liposomal, and especially injectable / IV forms — for antioxidant support and detoxification. Its most popular grey-market use is cosmetic skin lightening, where it is marketed heavily despite thin and inconsistent clinical evidence and unclear safety for that purpose. It is included here as the rare true peptide among the antioxidant / cofactor compounds; it is a supplement and research reagent, not an FDA-approved drug for these uses.
A redox buffer — its cysteine thiol donates electrons to neutralize reactive oxygen species and is a substrate for glutathione peroxidases and S-transferases in detoxification; cycles between reduced (GSH) and oxidized (GSSG) forms.
Behind every vial of Glutathione is the same exacting pipeline every research peptide runs — but the chemistry plays out differently for this molecule. Here is how Glutathione, specifically, is brought into being.
On paper, Glutathione is C10H17N3O6S — about 307.32 daltons of precisely arranged atoms. Before a single bond is made, the target sequence, salt form, and purity threshold are written down as the contract the finished material must meet.
Glutathione is built one protected residue at a time by solid-phase synthesis, each cycle a deprotection, a coupling, and a wash. It also carries a disulfide bridge, an extra step beyond a plain chain that adds both capability and cost.
The crude mixture — Glutathione plus its deletions and side products — is then separated on preparative HPLC, and where the cut is taken decides the difference between a genuinely pure peptide and a barely-passable one.
A real batch of Glutathione proves itself: identity confirmed by mass spectrometry against its ~307.32 Da, purity read directly off an analytical HPLC trace, water and counterion content measured. That batch-specific certificate of analysis is the only honest way to know what is actually in a vial of Glutathione — and a short, cold, accountable chain of custody is how that purity survives the trip to your bench.
Glutathione (γ-Glu-Cys-Gly) is a tripeptide with an unusual side-chain (γ-glutamyl) bond and a free, oxidation-prone cysteine thiol; it is produced mainly by fermentation or enzymatic synthesis rather than solid-phase chemistry. Keeping the cysteine reduced — it readily oxidizes to the disulfide GSSG — is the dominant quality and stability concern.
Don't judge a vial by its cake. A fluffy, good-looking lyophilized powder reflects bulking agents and freeze-drying parameters — not purity. Insist on a batch-specific certificate of analysis.
Recent clinical trials and publications mentioning Glutathione, pulled automatically from ClinicalTrials.gov and PubMed and refreshed daily. Listings are unfiltered search results, not curated endorsements.
Glutathione (GSH) is the body’s master antioxidant — a tripeptide of glutamate, cysteine, and glycine that neutralizes reactive oxygen species and supports detoxification.
Yes — it is a tripeptide (γ-Glu-Cys-Gly), one of the few true peptides among the antioxidant and cofactor compounds catalogued here, though it is usually thought of as a metabolite.
It is marketed heavily for skin lightening, but the clinical evidence is weak and inconsistent and its safety for that use is unclear. This page is a research and educational reference, not medical advice.
No — it is sold as a supplement and research reagent, not an FDA-approved drug for antioxidant, detox, or cosmetic uses.
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