A Glutathione research supplier built around testing and transparency.
Glutathione quality and supply chain
Glutathione Labs is a dedicated Glutathione research supplier with a controlled sourcing and quality-assurance program. Research material is sourced through our qualified manufacturing supply chain and subjected to analytical testing and lot-level documentation before release.
Last updated
From manufacturing partner to purchase
Every Glutathione lot follows the same path. The later steps are published, so you can check them for any lot.
- Qualified manufacturing partner Glutathione research material is produced by a qualified manufacturing partner within Glutathione Labs’ supply chain.
- Glutathione Labs specifications Material is produced and evaluated against Glutathione Labs’ defined specifications and quality requirements. Details
- Incoming and batch documentation Each batch is documented on receipt and assigned a lot number, printed on every vial label.
- Independent analytical testing Samples from the lot are tested by Freedom Diagnostics for HPLC-UV purity, LC-MS identity and net content, with endotoxin and PCR where listed. Details
- Lot review and release Results are reviewed against the stated specification (≥95% HPLC-UV purity, identity confirmed by LC-MS) before release.
- COA and analytical record The lot record and laboratory certificate are published under the lot number. Details
- Lot verification Anyone can look the lot up and confirm the result with the laboratory. Details
- Purchase through Klow.bio Released lots are available through Klow.bio, the purchasing platform operated by Klow Labs. Details
Controlled supply chain
Glutathione Labs works with qualified manufacturing partners and maintains defined specifications and quality requirements for Glutathione research material. Glutathione Labs is not the physical manufacturer; its role is to control what is sourced, document each batch, have it tested independently and publish the results.
Defined specifications
Glutathione Labs’ stated release specification is ≥95% HPLC-UV purity with identity confirmed by LC-MS against the expected molecular weight of 307.32 g/mol. The full specification, from molecular formula to physical form, is published on the Glutathione specifications page.
Independent analytical testing
Testing is performed by Freedom Diagnostics, an independent laboratory, not in-house. Instead of a "third-party tested" badge, each lot's actual results are published: current lots report 99.37% purity, with identity confirmed on every lot. How each test works.
Lot-level transparency
Any vial can be traced in one path: product, lot number, testing, certificate and verification. Start with the lot number on the label at buyglutathionepeptide.com/verify.
Availability
Released lots are available through Klow.bio, the purchasing platform operated by Klow Labs, which also operates Glutathione Labs.
Current lots
The published end of the supply chain: every released lot and its results.
| Lot | Vial size | Net content | Purity (HPLC-UV) | Identity (LC-MS) | Endotoxin (LAL) | Microbial (PCR) | Reported | COA |
|---|---|---|---|---|---|---|---|---|
| KB9987 | 600 mg | 567.86 mg | 99.37% | Confirmed | Not tested | Not tested | View lot KB9987 | |
| KB9987 | 600 mg | 567.86 mg | 99.37% | Confirmed | Not tested | Not tested | View lot KB9987 |
Testing laboratory: Freedom Diagnostics. Release specification: purity ≥95% by HPLC-UV with identity confirmed by LC-MS. Results apply only to the lot listed. Certificates list the testing client as Klow.bio / Klow Labs LLC, the company that operates Glutathione Labs.
Why researchers choose Glutathione Labs
Each reason links to the evidence behind it.
Dedicated Glutathione research focus
One compound, not a catalog of unrelated products.
Controlled manufacturing supply chain
Material sourced through qualified manufacturing partners.
Defined release specifications
≥95% HPLC-UV purity with identity confirmed by LC-MS.
Independent analytical testing
Every lot tested by Freedom Diagnostics, with the results shown.
Lot-specific documentation
A public record for every lot, with dates and laboratory reference numbers.
COA access
The laboratory certificate for each lot.
Lot verification
Look up any lot by the number on the vial.
Transparent research-use-only positioning
Clear about what the material is for and what we don't provide.
Current availability through Klow.bio
Live stock, pricing and checkout.
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.