Glutathione research: overview and resources
What Glutathione research material is, how it is characterized, and where to find every specification, method, lot record and reference Glutathione Labs publishes about it.
What is Glutathione?
Glutathione (GSH) is the tripeptide γ-L-glutamyl-L-cysteinylglycine. Unlike an ordinary peptide, its first bond is made through the side-chain (γ) carboxyl of glutamate rather than the backbone carboxyl, which protects it from most peptidases. Its cysteine thiol is the reactive centre: two glutathione molecules can be oxidized to the disulfide GSSG, and the GSH/GSSG pair is the main thiol redox buffer inside cells, which is why glutathione is one of the most widely used reagents in biochemistry and cell biology.
Glutathione Labs supplies reduced glutathione as a lyophilized powder in 600 mg vials. Every lot is tested by an independent laboratory for HPLC-UV purity, LC-MS identity and net content, with the certificate published here before sale through Klow.bio.
What is Glutathione research material?
Glutathione research material is Glutathione supplied for laboratory research (C10H17N3O6S, 307.32 g/mol) in white lyophilized powder form, sold by lot. Each lot's identity, purity and net content are documented by an independent laboratory in a published certificate of analysis.
How is Glutathione characterized?
Three questions are answered for every lot, each by a different method:
- Is it the right compound? LC-MS separates the sample and measures the mass of the main component, confirming it has the molecular weight expected for the compound.
- How much of the sample is that compound? HPLC-UV reports the main peak's share of detected peak area. Current lots: 99.37%.
- How much peptide is in the vial? Net content is measured directly.
Endotoxin (LAL) and microbial DNA (PCR) results are added where those tests are run.
What has not been established
A certificate of analysis describes the specific sample tested on its test date. It does not establish stability afterward, sequence order beyond what mass confirmation shows, results for other lots, or suitability for any particular purpose.
Glutathione at a glance
- Product
- Glutathione
- Type
- Tripeptide thiol (reduced glutathione, GSH), 3 residues
- Also known as
- GSH, Reduced glutathione, γ-L-Glutamyl-L-cysteinylglycine
- CAS number
- 70-18-8
- Molecular formula
- C10H17N3O6S
- Molecular weight
- 307.32 g/mol (average)
- Form
- White lyophilized powder
- Vial sizes
- 600 mg
- Purity, current lots
- 99.37% (HPLC-UV)
- Purity specification
- ≥95%
- Identity
- Confirmed by LC-MS on every lot
- Testing laboratory
- Freedom Diagnostics (independent)
- Current lot
- KB9987, reported May 20, 2026
- Operated by
- Klow Labs LLC, Chicago, IL
- Where to order
- klow.bio
Glutathione research resources
Every Glutathione resource on buyglutathionepeptide.com, organized from chemistry to documentation.
Glutathione specifications
Formula, molecular weight, sequence, modifications and release specification.
QualityQuality and supply chain
Sourcing, specifications, batch documentation and release.
TestingAnalytical testing
How every lot is tested, reviewed and released.
TestingHPLC analysis of Glutathione
Retention time, peaks, area normalization and results by lot.
DocumentationCertificates of analysis
Every lot's full results, plus the complete testing records.
DocumentationHow to read a Glutathione COA
What each section means and what a COA does and doesn't establish.
DocumentationVerify a lot
Look up any Glutathione lot by the number on the vial.
AnalysisPurity, content and net content
Three different numbers, kept apart.
HandlingStorage and stability
Degradation pathways and lyophilized peptide handling.
ReferenceGlossary
Definitions for every term on a Glutathione certificate.
Research materialGlutathione research material
Sizes, current lots and availability. Purchasing is handled through Klow.bio.
Research references
Published sources
- PubChem: Glutathione. National Library of Medicine, NIH. pubchem.ncbi.nlm.nih.gov/compound/124886
- Wilm M. Principles of electrospray ionization. Mol Cell Proteomics. 2011. PMC3134074. pmc.ncbi.nlm.nih.gov/articles/PMC3134074
- U.S. FDA. Q2(R2) Validation of Analytical Procedures. 2024. fda.gov
- U.S. FDA. Pyrogen and Endotoxins Testing: Questions and Answers. Revised 2026. fda.gov
Glutathione Labs analytical documentation
- Lot KB9987: 600 mg, 99.37% purity, reported May 20, 2026
- Lot KB9987: 600 mg, 99.37% purity, reported May 20, 2026
- Glutathione testing records (all tests, all lots; CSV available)
Editorial scope
Glutathione Labs research content covers molecular characteristics, peptide structure, analytical chemistry, purity and identity testing, certificates of analysis, lot documentation and laboratory storage and handling.
It does not cover dosing, administration instructions, protocols, personal use or medical advice.
Latest updates
Buy Glutathione
600 mg vials. Current lot KB9987 tested at 99.37% purity with identity confirmed by LC-MS. Current purchasing is available through Klow.bio.