Short answer: GHK-Cu is a small copper-binding peptide that occurs naturally in human plasma, saliva and urine, and it is one of the most studied molecules in skin and collagen research. In Canada you will find it in two very different forms: low-concentration cosmetic serums, and research-grade lyophilized powder. This guide explains what GHK-Cu is, what the research has actually shown, how research-grade material differs from what is in a face cream, what it should cost per milligram, and how to check that you are getting the real thing.
What is GHK-Cu?
GHK is a tripeptide made of just three amino acids: glycine, histidine and lysine (Gly-His-Lys). It has an unusually strong affinity for copper(II) ions, and in the body it exists largely as a copper complex, which is what GHK-Cu refers to. You will also see it called copper tripeptide-1 on cosmetic ingredient labels, or simply “copper peptide.”
The molecule was identified in the early 1970s by Dr. Loren Pickart, who noticed that something in the plasma of younger people made liver tissue from older donors behave more like young tissue in culture. That “something” turned out to be GHK. Since then it has been the subject of several hundred papers, most of them on skin, collagen and tissue remodelling.
| Sequence | Gly-His-Lys complexed with Cu(II) |
|---|---|
| Molecular weight | ~340 Da (GHK), ~404 Da (GHK-Cu) |
| Appearance | Blue to violet powder (from the copper complex) |
| Occurs naturally in | Human plasma, saliva, urine |
| Common vial sizes | 50 mg, 100 mg (lyophilized) |
| Reconstitution | Bacteriostatic water |
Why GHK-Cu levels and age matter to researchers
One finding drives most of the interest in this peptide. Pickart’s work reported that plasma GHK concentrations are substantially higher in young adults than in older people, falling by more than half between the early twenties and the sixties. That decline lines up, in time, with the slowdown in skin repair and collagen production that comes with age.
Correlation is not causation, and nobody has shown that low GHK causes skin ageing. But it gave researchers a clear question to test: if you restore GHK-Cu in a tissue model, does that tissue behave more like younger tissue? Most of the research below is some version of that experiment.
What the research has studied
The evidence base is mostly cell culture, animal models and small cosmetic studies. These are the main threads.
1. Collagen and extracellular matrix
The foundational paper is a 1988 study by Maquart and colleagues in FEBS Letters, which found that GHK-Cu stimulated collagen synthesis in cultured human fibroblasts at very low (nanomolar) concentrations. Follow-up work extended this to other matrix components, including elastin, glycosaminoglycans and decorin, and to the enzymes (metalloproteinases and their inhibitors) that break old matrix down and clear the way for new tissue.
That two-sided effect is the interesting part. GHK-Cu appears to influence both the building and the remodelling of the matrix, which is why it shows up in wound and scar research rather than only in anti-wrinkle marketing.
2. Wound models
In several animal wound models, GHK-Cu was associated with faster wound contraction, more new blood vessels and better-organized tissue. Reviews by Pickart and colleagues summarize work in rats, rabbits and pigs, including models where healing is normally impaired.
3. Gene expression
This is the newest and most cited thread. Using the Broad Institute’s Connectivity Map, a large database of how compounds change gene activity in human cells, Pickart and colleagues reported in 2015 and 2018 that GHK shifted the expression of a large number of human genes, many of them involved in tissue repair, antioxidant defence and inflammation. They argue this explains why one small molecule shows up in so many different models.
Read this carefully: “changes the expression of thousands of genes” is a database finding in cultured cells, not a demonstrated effect in a living person. It is a strong reason to study GHK-Cu, not a claim about what it does in your protocol.
4. Hair follicle models
Copper peptides have been examined for effects on hair follicle size and dermal papilla cells in culture. The data is limited and largely early-stage, but it is why copper peptides, and especially AHK-Cu, appear in hair research.
5. Antioxidant and anti-inflammatory activity
GHK can bind copper and other metal ions in a way that limits free-radical damage in some models, and it has been reported to reduce certain inflammatory cytokines. Like most of this literature, it is preclinical.
Research-grade vs cosmetic GHK-Cu
Most Canadians first meet GHK-Cu on a skincare label. That product and a research vial are not the same thing.
| Cosmetic serum | Research-grade powder | |
|---|---|---|
| Form | Pre-mixed in a cream or serum base | Lyophilized (freeze-dried) powder |
| Concentration | Usually low and often undisclosed | Known mass per vial (e.g. 50 or 100 mg) |
| Testing | Rarely tested for peptide content | Batch COA with HPLC and mass spectrometry |
| Intended use | Topical consumer product | In vitro and laboratory research |
For research work, the key difference is control. With a weighed, tested powder you know how much peptide you are working with. With a finished serum you usually do not.
GHK-Cu vs AHK-Cu and the GLOW / KLOW blends
AHK-Cu is a close cousin: alanine replaces glycine in the first position. It is studied mainly in hair follicle models, while GHK-Cu has the broader skin, collagen and wound literature. Researchers comparing copper peptides often run both side by side.
GHK-Cu is also the copper component in two popular multi-peptide blends:
- GLOW blend: GHK-Cu with BPC-157 and TB-500, combining matrix, blood supply and cell-migration research in one vial.
- KLOW blend: the GLOW components plus KPV, a short anti-inflammatory peptide fragment.
For background on the other components, see our guides to BPC-157 in Canada and TB-500 in Canada.
Is GHK-Cu legal in Canada?
Yes. Copper tripeptide-1 is a common ingredient in cosmetics sold across Canada. Research-grade GHK-Cu powder is a separate product: it is not approved by Health Canada as a drug and is sold as a research chemical, labelled for laboratory use only and not for human or veterinary use. All TrueLabs compounds are supplied strictly for in vitro and laboratory research.
How to buy GHK-Cu in Canada
GHK-Cu is cheap per milligram, which means margins come from volume and shortcuts are tempting. Check these five things before you order.
- It ships from inside Canada. No CBSA hold, no brokerage fees, delivery in 2–4 business days.
- The COA is batch-specific and the lot number matches your vial.
- Identity by mass spectrometry. Look for a mass consistent with the GHK-Cu complex, not just an HPLC purity figure.
- Copper content makes sense. Real GHK-Cu powder is blue to violet. A white powder sold as GHK-Cu is either uncomplexed GHK or something else entirely. Colour alone does not prove identity, but the wrong colour is a clear warning.
- CAD pricing and a Canadian contact. Otherwise it is probably a reseller shipping from abroad.
GHK-Cu price in Canada
Because research vials of GHK-Cu are large (50 to 100 mg), compare on price per milligram.
| TrueLabs GHK-Cu | Price (pre-order) | Per mg |
|---|---|---|
| 50 mg | $49.00 | $0.98 |
| 100 mg | $70.00 | $0.70 |
The 100 mg vial costs about 30% less per mg. Orders over $200 ship free anywhere in Canada.
Storage and handling
- Lyophilized powder: −20 °C long term, 2–8 °C short term, sealed and away from light and moisture.
- After reconstitution: refrigerate at 2–8 °C and avoid repeated freeze-thaw cycles.
- Avoid strong reducing agents and chelators in your buffers, which can strip the copper from the complex.
- Diluent: bacteriostatic water is the standard choice for multi-use lab vials.
Frequently asked questions
Cliquez sur une question pour afficher la réponse.
What is GHK-Cu?
GHK-Cu is a naturally occurring copper complex of the tripeptide glycyl-histidyl-lysine. It is widely studied in collagen, skin remodelling and wound research.
Is GHK-Cu legal in Canada?
Yes. Copper tripeptide-1 is used in cosmetics in Canada. Research-grade GHK-Cu powder is not approved as a drug and is sold for laboratory research use only.
What colour should GHK-Cu powder be?
Blue to violet, because of the copper complex. White powder sold as GHK-Cu is a warning sign, although colour alone does not confirm identity.
How much does GHK-Cu cost in Canada?
At TrueLabs, $49 for 50 mg or $70 for 100 mg during the current pre-order, which works out to $0.70 to $0.98 per mg.
What is the difference between GHK-Cu and AHK-Cu?
AHK-Cu swaps glycine for alanine. It is studied mainly in hair follicle models, while GHK-Cu has a broader skin, collagen and wound literature.
Where can I buy GHK-Cu in Canada?
From a supplier that ships domestically and provides a batch-specific COA with mass spectrometry identity. TrueLabs ships from inside Canada in 2–4 business days with no customs.
Related reading
- GHK-Cu side effects: topical vs injected
- How to read a peptide COA
- Buy BPC-157 in Canada: price, purity and research guide
- Buy TB-500 in Canada: price and research guide
- How to choose a research peptide supplier in Canada
Selected research references
- Maquart FX, Pickart L, Laurent M, Gillery P, Monboisse JC, Borel JP. Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+. FEBS Lett. 1988;238(2):343–346. PubMed
- Pickart L, Vasquez-Soltero JM, Margolina A. GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration. Biomed Res Int. 2015;2015:648108. PubMed
- Pickart L, Margolina A. Regenerative and protective actions of the GHK-Cu peptide in the light of the new gene data. Int J Mol Sci. 2018;19(7):1987. PubMed
All TrueLabs products are sold for in vitro and laboratory research use only. They are not intended for human or veterinary use, and nothing in this article is medical advice or a recommendation to use any compound. For skin or health concerns, please talk to a doctor or dermatologist.