Glutathione Peptide
Three amino acids your own liver assembles constantly. The cosmetic injectable evidence comes down to one 32-patient trial that landed at p equals 0.054, which is a number worth sitting with.
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For research use only. Not for human or veterinary use.
What Glutathione Peptide is
The plain-language version, first.
Three residues. Your liver is making some right now.
Glutathione is an endogenous tripeptide, gamma-L-glutamyl-L-cysteinyl-glycine, with molecular formula C10H17N3O6S, molar mass 307.32 and CAS 70-18-8, in which the glutamate is joined through its side chain carboxyl rather than the usual alpha carboxyl. The single placebo-controlled trial of the injectable form did not reach statistical significance, and half of the treated group showed liver enzyme derangement.
This is the least exotic molecule in the catalogue and one of the most important ones in your body.
Three amino acids. Glutamate, cysteine, glycine. Your cells build it themselves, continuously, mostly in the liver.
It is the cell's main workhorse antioxidant, and there is no argument about that part at all.
Which makes it a strange thing to sell, because unlike everything else here, you are not short of it under ordinary circumstances. Your body's production is the baseline.
The commercial interest is not really about the molecule's biology. It is about whether giving more of it from outside changes anything.
A genuinely essential compound, and a genuinely unsettled question about supplementing it.
What is glutathione?
Mechanism studied, not outcome promised.
The bond runs from glutamate side chain rather than its alpha carboxyl, which is what makes the tripeptide resistant to ordinary peptidases.
The chemistry happens inside cells at millimolar concentrations. Plasma glutathione is a separate, much smaller pool, and raising it does not straightforwardly raise the intracellular one.
The most abundant antioxidant in the cell, and the delivery problem nobody solved.
Alright, antioxidants. There is a lot of nonsense in this area so let's be careful.
Oxidative chemistry inside a cell is not simply damage to be mopped up. It is also signalling. Cells use it deliberately.
So the picture of an antioxidant as a sponge soaking up bad stuff is the wrong picture, and it is the one most marketing uses.
Glutathione's real role is as part of a regulated redox system, with enzymes that recycle it and a ratio the cell actively maintains.
The interesting technical problem is delivery. A tripeptide taken orally faces the same digestion every peptide on this shelf faces, which is why the injectable form exists at all.
Here's the honest part. A molecule being essential does not mean more of it is better.
The cell maintains a ratio on purpose. Pushing on a regulated system from outside is a real question, not an obvious win.
The research so far for Glutathione Peptide
Where the evidence is thin, we say so.
Glutathione is the principal cellular antioxidant, central to redox balance and to detoxification through glutathione S-transferases. Its biological importance is foundational.
One placebo-controlled cosmetic trial that missed at p equals 0.054 with substantial adverse events, and a null 21-patient trial in Parkinson disease. Two reviews describe the intravenous evidence as inadequate or contraindicated.
The single placebo-controlled intravenous trial for skin lightening, 32 completers, reported improvement in 37.5 percent against 18.7 percent on placebo at p equals 0.054, which is not significant. Adverse events included deranged liver function tests in 8 of 16 treated patients and anaphylaxis in 1. A 2025 systematic review concludes intravenous glutathione is contraindicated due to lack of efficacy and side effects.
One small trial, one very narrow miss, and a large industry built on top.
The evidence people cite and the evidence that exists are not the same size, and one number tells the whole story.
The cosmetic injectable literature comes down substantially to one trial, 32 patients, reporting a result at p equals 0.054.
That is not a positive result. It is also not nothing. It is a small study that landed just outside the line everybody agreed to use.
Which is genuinely worth sitting with, because it is the exact situation where a bigger trial would settle it and a bigger trial has not been run.
Meanwhile the basic biochemistry is beyond dispute, extensively documented, and about the molecule's role inside cells rather than about giving it to people.
One narrow miss in 32 people, an enormous industry, and no follow-up large enough to answer the question. We would rather show you the number than round it in either direction.
Glutathione vial sizes and current stock are just below.
Glutathione Peptide specs
The chemistry, exactly as released.
Who studies Glutathione Peptide
Who tends to order this one, and why.
A research compound does not have one audience. It has a handful of rooms where the same question keeps coming up, and the question is a different question in each of them.
Redox biology
The GSH to GSSG ratio is a standard measure of cellular redox state, and glutathione reductase and NADPH regeneration are core biochemistry.
Toxicology
Glutathione S-transferase conjugation is a major hepatic route for preparing xenobiotics for excretion, and glutathione depletion is central to paracetamol toxicity.
Dermatology
The pigmentation literature, and the systematic reviews that assessed it. The 2025 International Journal of Dermatology review is the current reference point.
Regulators
The Philippine FDA advisory 2019-182 is the clearest formal regulatory statement on cosmetic injectable use anywhere.
Sold for laboratory research only. This is not guidance for personal use, and nothing here is a recommendation.
Glutathione Peptide backstory
How it got here.
Glutathione was characterised as a biological molecule long before anyone thought of injecting it. It is one of the foundational molecules of redox biology and its role in cellular defence has been studied for a century.
The therapeutic interest split. One branch pursued precursors, notably N-acetylcysteine, on the logic that supplying the rate-limiting amino acid lets cells make their own.
That approach produced an approved drug for paracetamol overdose and is well established. The other branch injected the tripeptide directly.
In several countries injectable glutathione was approved for specific narrow indications, in the Philippines as a chemotherapy adjunct and reportedly in India for alcoholic liver disease. The cosmetic market grew from an incidental observation about pigmentation, not from a development programme, and it grew far faster than the evidence supporting it.
- 1
A century of redox biology
Glutathione role in cellular defence has been studied since the early twentieth century. Nothing about that foundational science is contested.
- 2
Two therapeutic branches
One pursued precursors like N-acetylcysteine, which produced an approved drug. The other injected the tripeptide directly, approved in a few countries for narrow indications.
- 3
A cosmetic market outran the evidence
Skin lightening use grew from an incidental pigmentation observation rather than a development programme, and grew far faster than any trial supporting it.
Buying Glutathione Peptide in Canada
What ships, how fast, and the paperwork.
The hard part of buying research material is almost never the compound. It is the logistics. What leaves the building, how fast it moves, and what is in the box beside the vial. Here is ours, plainly.
The reviews are not favourable and you should read them
A 2025 systematic review concludes intravenous glutathione is contraindicated due to lack of efficacy and side effects. A 2018 review calls the intravenous evidence a single study with a dubious study design. Those are the two documents worth reading before you decide anything.
Same day out of British Columbia
Our building, our cold packs, our people, and nothing sitting in a customs queue while you refresh a tracking page.
The delivery method is prohibited in sport
Glutathione is not named on the WADA list, but M2.2 prohibits intravenous infusions or injections exceeding 100 millilitres per 12 hours outside hospital, surgical or diagnostic settings. Any standard drip is a prohibited method regardless of what is in the bag.
Glutathione Peptide vs NAC (the precursor route)
Stacked together constantly, compared almost never.
The interesting comparison here is not against another peptide. It is against the precursor strategy medicine already uses.
Direct glutathione delivers the finished tripeptide, and the delivery question is the entire debate: digestion dismantles it orally, and the parenteral cosmetic evidence rests on one 32-patient trial at p equals 0.054.
N-acetylcysteine supplies the rate-limiting ingredient and lets cells build their own, which is the route with an actual approved medical use behind it.
Cells guard their own redox balance. Handing them raw material has a longer track record than handing them the finished product, and that asymmetry is the whole comparison.
Stuff people ask about Glutathione Peptide
If your question is not here, email us. Real human answers.
The only placebo-controlled intravenous trial says not significantly. Zubair and colleagues in 2017 studied 32 completers at 1200 milligrams twice weekly for six weeks. Improvement occurred in 37.5 percent against 18.7 percent on placebo, p equals 0.054, which does not reach statistical significance. A 2025 systematic review in the International Journal of Dermatology concludes that intravenous glutathione is contraindicated due to lack of efficacy and side effects.
Deranged liver function tests in 8 patients and anaphylaxis in 1, described as severe and warranting discontinuation. Eight of sixteen treated patients is half the group. Those adverse events are frequently omitted when the trial is cited.
Yes. Philippine FDA Advisory 2019-182 states that injectable glutathione is approved in the Philippines only as an adjunct in cisplatin chemotherapy, that there are no published clinical trials evaluating injectable glutathione for skin lightening, and that there are no published guidelines for appropriate dosing regimens or duration for that use. Risks cited include effects on liver, kidney and nervous system, Stevens-Johnson syndrome, and transmission of bloodborne infection from non-sterile administration.
Because they are different compartments. The chemistry that matters happens inside cells at millimolar concentrations, using glutathione the cell synthesised itself from glutamate, cysteine and glycine. Plasma glutathione is a separate and much smaller pool, and the cell membrane is not freely permeable to the intact tripeptide. Precursor approaches such as N-acetylcysteine target the rate-limiting step instead, which is why they have historically been the more credible route.
The best designed one was null. Hauser and colleagues, Movement Disorders 2009, randomised 21 patients to intravenous glutathione 1400 milligrams three times weekly for four weeks or placebo, and found no significant difference in UPDRS. An earlier enthusiastic result reporting a 42 percent decline in disability was 9 patients, open label and uncontrolled.
In a few countries for narrow indications. The Philippines approves it as an adjunct in cisplatin chemotherapy. It is reportedly approved in India for alcoholic liver conditions, which we could not verify at the regulator directly. Health Canada lists glutathione only in oral, intraocular and irrigation products, with no authorised systemic injectable. In the United States it sits in FDA compounding Category 1, which is enforcement discretion pending evaluation rather than approval.
Good pairing options with Glutathione Peptide
What researchers stack alongside it.
Pairing is where research gets ahead of itself. These are the compounds researchers put in the same order as Glutathione Peptide, which is a statement about ordering habits, not about evidence. Two things in one cart have not been studied together unless somebody studied them together.
Without a zinc atom it is completely inert. Not less active. Inert. The metal is not a supporting player here, it is half the molecule's identity.
It has no sequence and no CAS number, because it is not a molecule. It is an extract of calf thymus, still in clinical use across Russia, and that combination is genuinely unusual.
Order Glutathione Peptide right now
One last look before you decide.
Freeze-dried, COA on the page, ships cold
If you are researching Glutathione Peptide and you want a source you do not have to second-guess, start with the paperwork on this page. For research use only.
Not for human consumption. Not approved by Health Canada or any other regulatory body.
Page last updated August 19, 2026
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