| Test | Method | Limit | Result |
|---|---|---|---|
| Purity | HPLC | ≥ 99.0% | 99.78% |
| Identity | Mass spectrometry | 307.3 ± 1.0 Da | 307.4 Da |
| Net content | Quantitative HPLC | ≥ 1500 mg | 1538.88 mg |
| Endotoxin | LAL assay | ≤ 0.5 EU/mg | 0.09 EU/mg |
| Sterility | Membrane filtration | No growth | No growth |
| Heavy metals | ICP-MS | ≤ 10 ppm total | 1.0 ppm |
| Moisture | Karl Fischer | ≤ 8.0% | 3.3% |
Thiol-containing tripeptide (Glu-Cys-Gly)
C10H17N3O6S
307.32 Da · 3 residues
3-residue chain. The full sequence and its mass-spec confirmation are on each lot certificate.
Cellular · Thiol-containing tripeptide (Glu-Cys-Gly)
1500 mg · 3 residues · 307.32 Da
Size$0.06/mg
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For in-vitro research use only. Not for human or animal use.
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GLP-3 RT 5 mg01Verified test results
L-Glutathione lot SA-LGL-2610 was tested Oct 8, 2026 at an independent laboratory before it shipped. Every value is printed against its limit, so a pass means something.
Certificate of analysis
99.78%
Purity by HPLC
Profile drawn from the reported purity
Purity by HPLC, identity by mass spectrometry, net content by quantitative HPLC, endotoxin by LAL, sterility by membrane filtration, heavy metals by ICP-MS and moisture by Karl Fischer. Report SA-LGL-2610-01, Oct 8, 2026. Open the lot record.
Open any lot's certificate. Your order ships from the current released lot, and its QR code opens this record.
99.78%
HPLC purity
Tested Oct 8, 2026 · 7/7 assays · sample
99.34%
HPLC purity
Tested Sep 10, 2026 · 7/7 assays · sample
02Verify your vial
Every vial label carries a QR code. Point your phone camera at it.
The code opens that lot's certificate with every assay value. No phone? Type the lot from your packing slip on Verify a lot.
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03Analytical identity
Studied in mitochondrial function and cellular-energy models in vitro.
| Compound | Thiol-containing tripeptide (Glu-Cys-Gly) |
|---|---|
| Formula | C10H17N3O6S |
| Molecular weight | 307.32 Da |
| Residues | 3 |
| CAS | 70-18-8 |
| Form | Lyophilised powder, 1500 mg |
| Storage | Sealed at -20 °C, away from light and moisture |
Sequence
3-residue chain. The full sequence and its mass-spec confirmation are on each lot certificate.
04In the lab
Glutathione (GSH) is the major cellular thiol, made by glutamate cysteine ligase and glutathione synthetase. In laboratory research it joins redox reactions, binds protein thiols (S-glutathionylation) and alters melanin formation in pigment cells.
Compound
L-GlutathioneGamma-Glu-Cys-Gly antioxidant tripeptideMelanoma cells
Endpoint studied
GSH kept tyrosinase and TYRP1 from reaching melanosomes; DCT and Pmel17 were unaffected.
Nakajima 2014 · PMID 23764898Human melanocytes
Endpoint studied
GSH and NAC blocked dopamine-induced JNK and p38 activation and apoptosis; non-thiol antioxidants did not.
Park 2007 · PMID 17481858Reviewed cell studies
Endpoint studied
Reviews GSH synthesis by two enzymes and its conjugation to protein thiols in redox signaling.
Zhang 2012 · PMID 22504020Pathways as reported in the cited laboratory studies. For in-vitro research use only.
05Research history
5 milestones, each linked to its PubMed record
Biochimica et Biophysica Acta
GSH reacts with dopaquinone to form thiol-dopa conjugates that favor phaeomelanin; it activates tyrosinase below 3 mM, inhibits it above.
PubMed · PMID 2903772Free Radical Biology & Medicine
A review framing GSH as the major cellular thiol in redox reactions and thioether formation.
PubMed · PMID 10569624Journal of Dermatological Science
GSH blocked dopamine-induced JNK and p38 activation and apoptosis in cultured melanocytes.
PubMed · PMID 17481858Seminars in Cell & Developmental Biology
A review of GSH synthesis, S-glutathionylation of protein thiols, GSNO and their roles in redox signaling.
PubMed · PMID 22504020Archives of Dermatological Research
GSH disrupts delivery of tyrosinase and TYRP1 to melanosomes in melanoma cells, lowering melanization.
PubMed · PMID 23764898 LatestLaboratory research only, cited for research context. Not a claim about use in people.
06Questions
About L-Glutathione, its certificate and your order.
Email [email protected], Monday to Friday. A person replies within one business day.
The current released lot, SA-LGL-2610. Scan the QR code on the vial label to open its certificate. The lot number is also on your packing slip, and the full certificate is here.
Every certificate is issued by an independent laboratory. Each lot has its own public record page with every assay value, and a link to verify the report on the lab's own site once the signed PDF is posted.
Vials are filled slightly over the labelled mass so that every vial meets it. Net content is measured on each lot and published as a number, not a pass.
Email [email protected] within 7 days with your order number and a photo and we will replace it.
Orders by 2 PM ET on a weekday ship the same day, with tracking emailed when the label prints.
No. It is sold strictly for in-vitro laboratory research and is not for human or animal use of any kind.
07Complete the box
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