Buy Glutathione UK — Research-Grade, Not Wellness-Grade
Glutathione is sold in two very different markets: as a wellness supplement, and as a research chemical. For laboratory use, the checks are the form (reduced GSH), the CAS number, and a batch COA that documents what is actually in the vial.
Last updated: 2026-08-21 · By: Index Peptides technical team
1. Reduced, not oxidised
The research-relevant form is reduced L-glutathione (GSH), CAS 70-18-8. Confirm the listing states the reduced form and the CAS — the oxidised form (GSSG) is a different molecule with different handling.
2. Purity and identity on the same record
A real COA shows the batch/lot number, HPLC purity, identity confirmation, the testing lab and the test date — on the same record as the lot you receive. For a widely commercialised molecule this is exactly where the difference between a research supplier and a generic seller shows up.
3. Check the COA against the batch number
The lot number on the vial must match the lot on the certificate, and the certificate should be checkable independently — enter the lot number on a public batch-verification page and the record comes back with the purity, identity and test date for that specific batch.
How to order from Index Peptides
Glutathione is available as a 1500mg lyophilised vial, with the certificate of analysis published on the product page and every released batch checkable by lot number on the verify page. Order online by Pay by Bank, bank transfer or crypto, or request an invoice for lab and institutional orders.
Frequently asked questions
What is the CAS number for reduced glutathione?
70-18-8, with a molecular weight of approximately 307.3 g/mol.
Is glutathione the same as what is sold as a supplement?
The compound is widely sold in other markets, but Index Peptides supplies it strictly for in-vitro laboratory research — not for human or animal consumption, administration or any in-vivo use.
Is glutathione legal to buy in the UK for research?
Supplied for in-vitro laboratory research use only. Index Peptides does not supply it for human or animal use of any kind.
References
Research use only. Not for human or animal consumption.