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The information on this page is for reference and is not medical advice or instructions for use. Batches come with a certificate of analysis from an independent laboratory. © Longeva

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Longeva · peptides with a certificate of analysis

Glutathione (GSH): an antioxidant tripeptide with documented purity

Glutathione (GSH) is a lyophilised powder with purity ≥99% (HPLC), ready to ship for research work. Every batch is checked by an independent third-party laboratory, and you can look the certificate of analysis up in the archive before ordering, with no empty promises on the label. Buying glutathione from Longeva means a lot with open documentation, not just powder in a vial. Not a medicinal or cosmetic product.

View product →Science reference ↗Характеристики
Lyophilised powder, HPLC-controlledIndependent third-party laboratoryArchive of certificates of analysisNo medical promises
GlutathionePurity is controlled by HPLC
What glutathione (GSH) is

Glutathione is made of three amino acids: glutamate is attached to cysteine through an atypical γ-carboxyl bond, and glycine is attached to cysteine through an ordinary α-bond. That γ-bond is what makes the molecule resistant to cleavage by most intracellular peptidases; the free thiol (-SH) group of cysteine is responsible for its reducing activity. Molecular formula: C₁₀H₁₇N₃O₆S, molar mass 307.32 g/mol, CAS 70-18-8. Inside the cell, glutathione works as a pair with its oxidised form GSSG: it is the main intracellular thiol redox buffer and a cofactor of the enzyme glutathione peroxidase, and glutathione S-transferases use it to conjugate electrophilic compounds. This describes the biochemistry of the molecule, not a promised effect. The full breakdown of the mechanism with primary-source citations is in the monograph at /en/wiki/glutathione.

Material specifications

SubstanceGlutathione (GSH)
ClassThiol tripeptide, antioxidant
CAS70-18-8
Molecular mass307.32 g/mol
FormLyophilised powder
Purity controlHPLC, ≥99% per batch certificate
Pack size1500 mg
Intended usePeptide with a certificate of analysis
Independent laboratory testing

Longeva sends samples for analysis to independent third-party laboratories itself (Janoshik, Testides, Uzorak, North American Diagnostics) rather than relying on the raw-material supplier's figures alone. These are third-party labs in the plain sense: none of them holds ISO 17025 accreditation, and we do not claim otherwise. Longeva peptide batches come with a certificate of analysis; published reports are collected in the open archive at /en/coa, searchable by product name or batch number. If there is no report for your particular glutathione batch yet, check back later: the archive fills up as new analyses come in.

Questions about glutathione (GSH)

Is glutathione a peptide or an amino acid?+

It is a tripeptide: three amino acids, glutamate, cysteine and glycine, joined by peptide bonds, rather than a single free amino acid. In everyday speech it is sometimes loosely called an "amino acid", but structurally it is a tripeptide.

Dosing

Reference data — not a recommendation

The information below is provided from public sources for reference only. It is not medical advice or instructions for use — only a doctor can set a schedule and a dose.

Glutathione is poorly absorbed orally, so protocols describe IM or SubQ dosing (200–1200 mg weekly) and IV infusions of 500–1400 mg. Learn more →

Full dosing guideTitration schedule · reference

View glutathione (GSH) in the Longeva catalogue

Specifications, the 1500 mg pack size and a link to the certificate archive are on the product page.

Go to the product →
How does GSH differ from GSSG?+

GSH is the reduced, active form with a free thiol group. On oxidation, two GSH molecules join through a disulfide bridge and form GSSG. In healthy cells the GSH/GSSG ratio usually exceeds 100:1, and research uses it as a marker of intracellular oxidative stress.

Does glutathione lighten or whiten skin?+

This is one of the most common searches about glutathione, but Longeva makes no cosmetic-effect claims: the evidence for that use is limited and mixed. Our glutathione is supplied only as material, not as a cosmetic or medicinal product. We do not sell it as a skin-whitening agent and we do not publish before/after photos.

Is there a certificate of analysis?+

Longeva peptide batches come with a certificate of analysis from an independent third-party laboratory. Published reports are collected in the open archive at /en/coa; if there is no report for a particular glutathione batch yet, check back later: the archive fills up as new analyses come in.

Where can I read the science on the molecule?+

The full breakdown of the structure, mechanism and research, with primary-source citations, is in the Longeva monograph at /en/wiki/glutathione. Practical handling, dissolution and storage are covered at /en/docs/glutathione.

How should glutathione be stored?+

Glutathione is hygroscopic and sensitive to oxidation in air. Keep the dry powder sealed, protected from light and moisture, at low temperature; for long-term storage a freezer is recommended. The detailed handling protocol is at /en/docs/glutathione.