Glutathione in Canada: Research Guide (2026)
For laboratory research use only. Nothing on this page is medical advice. The product sold here is a research reagent — it is not a drug, not a supplement, and not for human use.
What is glutathione?
Glutathione (GSH) is an endogenous tripeptide — gamma-glutamyl-cysteinyl-glycine — present in virtually every cell, where it is the most abundant intracellular thiol. Its chemistry is its job: the cysteine residue’s sulfhydryl group lets glutathione cycle between a reduced form (GSH) and an oxidised dimer (GSSG), and that GSH/GSSG redox couple is one of the central buffers cells use to manage oxidative state. Unlike most compounds in a research-peptide catalogue, glutathione is not an investigational drug candidate — it is a cornerstone molecule of basic biochemistry, and it has been a standard laboratory reagent for decades.
That last point matters for what this page is. Glutathione in Canada exists in three completely different categories — a minor ingredient in a few authorised ophthalmic products, an oral natural-health-product supplement market, and the research-reagent category this product belongs to — and the sections below keep them separate.
Where glutathione appears in research
Redox biology and oxidative-stress assays. The GSH/GSSG ratio is a workhorse readout for cellular oxidative state, and glutathione itself is used to set, probe and rescue redox conditions in cell-culture work. Conjugation and detoxification chemistry. Glutathione S-transferase (GST) enzymes couple glutathione to electrophilic compounds — a pathway central to xenobiotic metabolism research, and the same chemistry behind GST-tag protein purification in molecular biology. Cell-culture practice. Reduced glutathione appears in media formulations and protective buffers across routine laboratory work. These are descriptions of how the reagent is used in laboratories, not claims about effects in people.
Regulatory status in Canada: three different categories
Precision matters here more than for most compounds. A search of Health Canada’s Drug Product Database (verified October 2026) shows glutathione only as a minor ingredient in a handful of ophthalmic surgical solutions — one currently marketed — and in no systemic or injectable drug product of any kind. Separately, oral glutathione is sold in Canada as a licensed natural health product under the NHP framework; that is a supplement category with its own rules, and it is not what this page sells. The product sold here is the third category: a research reagent for laboratory use only — not a drug, not a supplement, and not part of the injectable “wellness” trend offered by some clinics, which involves practitioner-administered products outside the scope of a research supplier. The wider framework: peptide legality in Canada.
Reduced vs oxidised, and the formats on the market
Research glutathione is supplied as reduced GSH — the active thiol form — as a lyophilized powder, because the reduced form oxidises in solution over time. The consumer market sells many other formats (liposomal liquids, capsules, effervescents) built around the oral-absorption question, which belongs to the supplement category rather than laboratory work. For a lab, the relevant facts are form (reduced), purity, and how recently the batch was tested.
Purity and the COA question
Quantum’s per-batch program applies to glutathione as to every listing: independent third-party HPLC purity (≥99% target) and identity confirmation, batch number printed on the vial, certificate published on the lab results hub as testing completes. For a thiol compound, batch freshness and storage matter more than usual — reduced glutathione should be kept cold, dark and dry until use. How to read a certificate: the COA guide.
Where to buy glutathione in Canada
Quantum Peptides supplies glutathione as a 1500mg lyophilized vial of reduced GSH for laboratory use — see the Glutathione 1500mg product page — shipping domestically from Edmonton. It sits in the catalogue alongside the other redox-and-metabolism research compounds: NAD+, SS-31 and MOTS-c. For research use only — not for human consumption. New to sourcing? Start with how to buy research peptides in Canada.
Frequently asked questions
Is glutathione legal in Canada?
Glutathione exists in three separate categories in Canada: a minor ingredient in a few authorised ophthalmic products, licensed oral natural-health-product supplements, and laboratory research reagents. The product sold here is the research reagent — legal to sell for laboratory use only, and not a drug or supplement.
Is this the same as a glutathione supplement?
No. Oral glutathione supplements are licensed natural health products with their own regulatory framework. This is a research-grade reagent vial for laboratory use, and it is not sold for human consumption in any form.
Is research glutathione the reduced (GSH) form?
Yes — the lyophilized vial contains reduced glutathione, the active thiol form used in redox research, which is why it ships dry: GSH oxidises to GSSG in solution over time.
What is glutathione used for in laboratories?
Redox and oxidative-stress assays (the GSH/GSSG couple), glutathione-conjugation and detox-pathway research involving GST enzymes, GST-tag protein purification, and as a protective component in cell-culture work.
What is the glutathione dosage?
We don’t provide dosing of any kind: this is a laboratory reagent, not a supplement or medicine, and questions about supplement or clinical use belong with the licensed products in those categories.
Does Quantum’s glutathione come with a COA?
Every batch goes through independent third-party testing; the batch-specific certificate is published on the lab results hub as testing completes. Check the current batch certificate there before purchase.
Related research guides: MOTS-c in Canada · NAD+ · SS-31 · Peptide shelf life & storage
For laboratory research use only. Not for human consumption. This page summarises regulatory records and laboratory practice for educational purposes and is not medical advice.