GHK-Cu is the copper-bound form of a three-amino-acid peptide - glycyl-histidyl-lysine. An identity fact, not a product claim.
Schlesinger et al., Experientia, 1977Plain-English research guideGHK-Cu (glycyl-histidyl-lysine : copper)
GHK-Cu research guide
Everything worth knowing, without the jargon.
GHK-Cu is a naturally occurring copper peptide - the copper-bound form of a three-amino-acid chain (glycyl-histidyl-lysine, GHK) that the body makes and carries in the blood. It's one of the most-studied small peptides there is, almost entirely in the lab.
Form Labs materials are research reference materials, not the approved medicines; no Form Labs product is approved for human or veterinary use.
REV 2026-10 · 1 Oct 20267 peer-reviewed studiesResearch-use-only context
What the papers reportThird-party literature - not product claims
The year the peptide's growth-modulating activity was first reported, in liver-cell research. Published research context, not a product claim.
Pickart, Thayer & Thaler, Biochem Biophys Res Commun, 1973About the level of GHK naturally circulating in a young adult's plasma; a 2018 review reports it falling to roughly 80 ng/mL by age 60. It's a peptide the body makes itself. Literature context, not a product claim.
Pickart & Margolina, Int J Mol Sci, 2018In gene-profiling research, the share of the genes analysed whose activity GHK shifted by at least half - some up, some down. A published research figure, not a product claim.
Pickart & Margolina, Int J Mol Sci, 2018Why it matters
Why is GHK-Cu studied?
GHK-Cu is studied because it is a naturally occurring copper peptide: the copper-bound form of glycyl-histidyl-lysine (GHK), a three-amino-acid chain the body makes and carries in the blood (Schlesinger et al., Experientia, 1977). Researchers noticed decades ago that its level is high when we are young and lower as we age. Most of the published research is on the copper-bound form, and almost all of it is in the lab.
A peptide the body already makes.
Schlesinger et al. (Experientia, 1977) identified a plasma factor as glycyl-histidyl-lysine. Lau and Sarkar (Biochemical Journal, 1981) mapped copper(II) binding to that peptide. These are identity and chemistry findings.
Maquart et al. (FEBS Letters, 1988) reported increased collagen synthesis in a cell model; Maquart et al. (Journal of Clinical Investigation, 1993) reported connective-tissue accumulation in an animal model. The models are separate from clinical research in people.
What the research doesn't have is large human trials. So this guide sticks to what the lab and animal studies actually looked at, and treats all of it as research context - not as anything the vial will do for a person.
Study observations
What laboratory observations have GHK-Cu studies reported?
Lau and Sarkar (Biochemical Journal, 1981) mapped copper binding to GHK. Maquart et al. (FEBS Letters, 1988) reported increased collagen synthesis in a cell model, and Maquart et al. (Journal of Clinical Investigation, 1993) reported connective-tissue accumulation in an animal model. These GHK-Cu observations remain separate laboratory and animal findings rather than established clinical outcomes.
GHK-Cu cell and animal measurements Findings stay tied to the cited study and its model.
Peptide identification
Schlesinger et al. (Experientia, 1977) identified the plasma factor as glycyl-histidyl-lysine; this is an identity finding.
Copper binding
Lau and Sarkar (Biochemical Journal, 1981) mapped copper(II) coordination to glycyl-histidyl-lysine in a chemistry study.
Cell and animal observations
Maquart et al. (FEBS Letters, 1988; Journal of Clinical Investigation, 1993) reported collagen and connective-tissue observations in separate cell and animal models.
Pharmacology at a glance
- Research code
- GHK-Cu (glycyl-histidyl-lysine : copper)
- Class
- A naturally occurring copper-binding tripeptide. 'Copper peptide' is the research category - not a drug class.
- Molecule
- A three-amino-acid peptide (glycyl-histidyl-lysine) bound to a single copper(II) atom; a blue freeze-dried powder as supplied.
- Reported half-life
- No clinical half-life is recorded in this guide.
- Originator
- A natural human peptide, not an invented drug. Its research was pioneered by Loren Pickart and colleagues from the 1970s on.
- Approval status
- Laboratory research material only. Not an approved medicine, cosmetic, or supplement, and not for human or veterinary use.
What it has been studied for
What has GHK-Cu been studied for?
GHK-Cu has been studied in five areas in the published literature: copper chemistry, collagen in cells and animals, skin pathways in the lab, hair-follicle cells in a dish, and gene expression. The collagen studies cited in this guide used cells and animals, not people, and the hair-follicle work used cultured cells, not anyone's scalp. All five are pathway or cell research, not cosmetic or product results.
Study areas from the published literature.
Copper chemistry
How a copper(II) ion binds the GHK peptide - the chemistry that defines the complex.
Lau & Sarkar, Biochem J, 1981Collagen, in cells and animals
Collagen production in cultured skin cells, and connective tissue in animal wound models. No human study.
Maquart et al., FEBS Letters 1988 / J Clin Invest 1993Skin pathways, in the lab
Reviewed for its role in laboratory skin-regeneration pathway research. Pathway work, not a cosmetic result.
Pickart et al., BioMed Research International, 2015Hair-follicle cells, in the dish
Studied in vitro on cultured human hair-follicle (dermal-papilla) cells. Cells in a dish, not anyone's scalp.
Pyo et al., Arch Pharm Res, 2007Gene expression
Gene-profiling research describing shifts in the activity of many genes in cell models.
Pickart & Margolina, Int J Mol Sci, 2018The studies
What did the GHK-Cu studies find?
The seven GHK-Cu studies cited in this guide are laboratory, animal and review work (Pickart, Thayer & Thaler, 1973, to Pickart & Margolina, 2018). Pickart, Thayer and Thaler (Biochem Biophys Res Commun, 1973) first reported the peptide's growth-modulating activity, and Lau and Sarkar (Biochemical Journal, 1981) mapped how copper(II) binds it. A review reported that GHK shifted about 31.2% of the genes analysed by at least half in cell-model profiling (Pickart and Margolina, International Journal of Molecular Sciences, 2018).
Open any study for a plain summary, what it measured, the finding, and a link to the paper.
The first report that a small peptide from human plasma could change how liver cells behaved in culture.
- Studied in
- Human liver cells and hepatoma (liver-tumour) cells in culture.
- Design
- An early laboratory study - the first look at the peptide's activity.
- Measured
- Cell survival and growth in the dish.
A three-amino-acid peptide from plasma helped keep normal liver cells alive and affected growth in the tumour cells - the observation that started decades of GHK research (Pickart, Thayer & Thaler - Biochem Biophys Res Commun - 1973).
DOI 10.1016/0006-291X(73)91459-9This paper pinned down the exact structure of the plasma peptide as glycyl-histidyl-lysine (GHK).
- Studied in
- Purified peptide from human plasma.
- Design
- Structural identification.
- Measured
- The amino-acid sequence of the active peptide.
The growth-modulating plasma factor was identified as the tripeptide glycyl-histidyl-lysine - the 'GHK' every later paper refers to (Schlesinger, Pickart & Thaler - Experientia - 1977).
DOI 10.1007/BF02002806Work suggesting GHK's activity is tied to how it carries copper into cells.
- Studied in
- Cell and biochemical systems.
- Design
- Mechanistic laboratory study.
- Measured
- How the peptide interacts with and moves copper.
The paper proposed that GHK works partly by helping copper get into cells - the idea behind studying the copper-bound form, GHK-Cu, rather than the peptide alone (Pickart and colleagues - Nature - 1980).
DOI 10.1038/288715a0A detailed look at the chemistry of how a copper(II) ion attaches to GHK.
- Studied in
- Purified GHK and copper(II) in solution.
- Design
- Coordination-chemistry study.
- Measured
- How, and how tightly, copper binds the peptide.
Mapped the way copper(II) coordinates to glycyl-histidyl-lysine - the chemistry that defines the GHK-Cu complex supplied as reference material (Lau & Sarkar - Biochemical Journal - 1981).
DOI 10.1042/bj1990649One of the landmark cell studies: collagen production in cultured skin cells exposed to the GHK-Cu complex.
- Studied in
- Cultured fibroblasts (a common collagen-making skin cell).
- Design
- An in-vitro cell-culture study.
- Measured
- Collagen synthesis by the cells.
In this cell model, the GHK-Cu complex was associated with more collagen synthesis (Maquart and colleagues - FEBS Letters - 1988). It's an in-vitro finding - cells in a dish, not people (Maquart and colleagues - FEBS Letters - 1988).
DOI 10.1016/0014-5793(88)80509-XA follow-up moving from the dish to an animal model, looking at connective tissue in experimental wounds.
- Studied in
- Rat experimental wounds.
- Design
- An in-vivo animal-model study.
- Measured
- Connective-tissue accumulation at the wound site.
In this animal model, the GHK-Cu complex was associated with more connective-tissue accumulation (Maquart and colleagues - Journal of Clinical Investigation - 1993). It's an animal finding, not a human result (Maquart and colleagues - Journal of Clinical Investigation - 1993).
DOI 10.1172/JCI116842A review gathering gene-profiling work on GHK - which genes shift, and by how much, in cell models.
- Studied in
- A review of published cell-model gene-expression data.
- Design
- A narrative review by GHK's original researchers.
- Measured
- Reported shifts in gene activity across profiling studies.
The review reports that GHK shifted about 31.2% of the genes analysed by at least half - some up, some down - in cell-model profiling (Pickart & Margolina - International Journal of Molecular Sciences - 2018). It's a laboratory research figure, and it's a review by the peptide's own researchers, so we cite it as published context, not proof (Pickart & Margolina - International Journal of Molecular Sciences - 2018).
DOI 10.3390/ijms19071987Where evidence stops
What has GHK-Cu research not established?
The GHK-Cu studies cited in this guide are cell cultures, animal models and reviews, and this guide lists large human clinical trials among the research it does not contain. The research cited in this guide gives no direction for use in or on people or animals, and describes the molecule in general, not what a specific batch does.
- Large human clinical trials - there aren't the big randomised human studies that newer metabolic peptides have.
- Any use in or on people or animals - none of the research on this page is a use direction.
- What a specific batch does - the studies are about the molecule in general, not this vial.
Development and status
Is GHK-Cu approved, and where does the research stand?
GHK-Cu is described in this guide as laboratory research material only. Its research timeline begins when a small plasma peptide was found to change liver-cell behaviour in culture (Pickart, Thayer & Thaler, 1973). The structure was identified in 1977 (Schlesinger et al., Experientia, 1977) and the copper(II) binding chemistry mapped in 1981 (Lau & Sarkar, Biochemical Journal, 1981). A gene-expression review followed in 2018 (Pickart & Margolina, International Journal of Molecular Sciences, 2018).
A tiny plasma peptide is found to change liver-cell behaviour in culture (Pickart, Thayer & Thaler).
The peptide's structure is identified as glycyl-histidyl-lysine - GHK (Schlesinger et al.).
Research links GHK's activity to carrying copper into cells (Pickart et al., Nature).
The copper(II)-GHK binding chemistry is mapped in detail (Lau & Sarkar).
GHK-Cu is studied for collagen synthesis in cultured skin cells (Maquart et al.).
Maquart et al. (Journal of Clinical Investigation, 1993) reported connective-tissue accumulation in an animal wound model.
Human hair-follicle cells are studied in vitro (Pyo et al.).
A review pulls together gene-expression profiling of GHK (Pickart & Margolina).
Approval status: Laboratory research material only. Not an approved medicine, cosmetic, or supplement, and not for human or veterinary use.Whatever the molecule’s status elsewhere, what Form Labs supplies is research-use-only reference material - for laboratory work, not for people or animals.
Evidence and limitations
What does the GHK-Cu research mean, and what does it not?
The GHK-Cu evidence base is mainly cell cultures, animal models and reviews, which helps in understanding the molecule but does not translate into claims about people. Many of the recent gene and plasma-level numbers trace back to reviews by the original GHK researchers, so they are cited as published context, not independent proof.
Most of it is lab and animal work
The GHK-Cu evidence base is mainly cell cultures, animal models, and reviews. That's useful for understanding the molecule, but it doesn't translate into claims about people.
Some key figures come from the same authors
A lot of the recent gene and plasma-level numbers trace back to reviews by GHK's original researchers. We cite them as published context, not independent proof.
The lab report is the authority for a batch
Historical sample reports and these papers do not establish current lot identity, purity or release status.
Lab handling
How is GHK-Cu handled as reference material?
GHK-Cu is laboratory reference material, not for human consumption or veterinary use. Storage and lot checks follow the product label and any verified matching certificate of analysis (COA). This guide's catalogue record notes storage at 2-8 C and protection from light. Historical sample reports do not verify current lot identity, purity or release status.
Research-use boundary
GHK-Cu is supplied strictly for laboratory research. It's not for human consumption, veterinary, medical, or cosmetic use.
COA and label
Historical sample reports do not establish current identity, purity or release status.
Storage
Store cold at 2-8 C and keep it out of light - copper peptides are light-sensitive.
Educational boundary
This guide is a plain summary of third-party research that Form Labs did not run. It isn't medical advice or a product claim.
Glossary
Plain-English definitions.
- GHK
- Glycyl-histidyl-lysine - a peptide of three amino acids (glycine, histidine, lysine).
- GHK-Cu
- The copper-bound form of GHK: the same peptide holding one copper(II) atom.
- Copper peptide
- A short peptide that binds a copper ion; GHK-Cu is the best-known example.
- Tripeptide
- A peptide made of three amino acids.
- In vitro
- In the dish - laboratory work in cells or solution, outside a living body.
- In vivo
- In a living organism - here, animal-model studies.
- Fibroblast
- A common skin cell that makes collagen; used in many GHK-Cu cell studies.
- Gene expression
- Which genes are switched on or off, and how strongly, in a cell.
- COA
- Certificate of analysis - the batch paperwork controlling identity, purity, appearance, and release.
- Research use only
- A lab-only boundary: not for human consumption, veterinary, medical, or cosmetic use.
FAQ
What are the most common questions about GHK-Cu?
GHK-Cu is a naturally occurring copper peptide that the body makes and that is supplied here as research-use-only laboratory reference material. The most common questions about GHK-Cu cover whether GHK-Cu is natural or synthetic, what the gene-profiling research does and does not show, why it is studied for skin and hair, what controls batch details, and its Australian status.
GHK is a peptide the body makes naturally and carries in the blood; the GHK-Cu supplied as research material is made to match it, as a copper-bound freeze-dried powder for the lab - so it is both.
Gene-profiling research describes GHK shifting the activity of a large share of the genes analysed - one 2018 review reports about 31% changing by at least half. That's a laboratory research figure in cell models, not a claim about what happens in a person. (You may see a 'resets 4,000 genes' headline online; that specific number isn't stated in the research, so we don't use it.)
A lot of the lab work looks at collagen in cultured skin cells and at hair-follicle cells in the dish. That's why those areas come up - but they're cell and animal studies, not proof of any cosmetic result, and this is research-only material.
A verified matching lab report (COA) would be needed for batch-specific findings. Current certification is unverified. The papers here are background only.
No. GHK-Cu is not an approved medicine in Australia. It is not on the Australian Register of Therapeutic Goods, and the TGA has not evaluated it for safety, quality or effectiveness. You may have seen GHK-Cu listed as an ingredient in cosmetic products sold elsewhere - that is a separate regulatory category and says nothing about the material on this page. Form Labs supplies GHK-Cu strictly as laboratory research material.
GHK-Cu is supplied in Australia as research-use-only reference material, not for human or veterinary use. It is not an approved medicine and is not on the Australian Register of Therapeutic Goods. Orders are limited to laboratory and research customers aged 21 or over.
'For research use only' means GHK-Cu is supplied strictly as laboratory reference material - for in-vitro research, not for use in or on humans or animals. It is not a medicine, a supplement, a cosmetic, or food. Everything on this page describes published research and the identity of this batch, not instructions for use.
References
Every figure, sourced.
Educational references to third-party literature. Form Labs is unaffiliated with the study authors.
Pickart L, Thayer L, Thaler MM. A synthetic tripeptide which increases survival of normal liver cells and stimulates growth in hepatoma cells. Biochem Biophys Res Commun. 1973.
DOISchlesinger DH, Pickart L, Thaler MM. Growth-modulating serum tripeptide is glycyl-histidyl-lysine. Experientia. 1977.
DOIPickart L, Freedman JH, Loker WJ, et al. Growth-modulating plasma tripeptide may function by facilitating copper uptake into cells. Nature. 1980.
DOILau SJ, Sarkar B. The interaction of copper(II) and glycyl-L-histidyl-L-lysine, a growth-modulating tripeptide from plasma. Biochem J. 1981.
DOIMaquart FX, Pickart L, Laurent M, et al. Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+. FEBS Lett. 1988.
DOIMaquart FX, Bellon G, Chaqour B, et al. In vivo stimulation of connective tissue accumulation by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+ in rat experimental wounds. J Clin Invest. 1993.
DOIPickart L, Vasquez-Soltero JM, Margolina A. GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration. Biomed Res Int. 2015.
DOIPickart 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.
DOICitations are provided for education only. No therapeutic, weight-loss, or efficacy claims are made.
How we produce these guides
These guides are written and maintained in-house by the Form Laboratories research team. They summarise published literature and link to the cited papers. Form Laboratories did not run those studies. They are not authored by a named clinician and are not medical advice.
Findings remain tied to the study population, model and limits. Cell and animal observations remain separate from clinical results. Everything we supply is research-use-only reference material, not for people or animals.
The product
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