What Is GHK-Cu? A Scientific Overview
By Neshiva · October 13, 2026
GHK-Cu is a copper-binding peptide complex that has attracted scientific interest because of its interactions with biological processes involved in connective tissue and skin biology. GHK refers to the amino acid sequence glycine, histidine, and lysine. The peptide can bind copper ions to form a copper-peptide complex.
What the research has examined
Scientists have investigated GHK-Cu in laboratory experiments involving fibroblasts, collagen synthesis, and extracellular matrix components. These studies provide insight into potential biological mechanisms, but laboratory observations should not be interpreted as proof that a particular topical skincare product delivers clinically meaningful results.
In a 1988 laboratory study, researchers observed increased collagen synthesis in cultured fibroblasts exposed to GHK-Cu. [1]
Researchers also observed changes in glycosaminoglycan synthesis in cultured human fibroblasts exposed to GHK-Cu. [2]
Research limitations
These findings do not establish that applying a GHK-Cu cream to human skin produces the same effect.
These are laboratory findings, not proof of visible cosmetic improvements in people.
Frequently asked questions
What does GHK stand for?
GHK refers to the amino acid sequence glycine, histidine, and lysine. When bound to copper ions, it forms the copper-peptide complex GHK-Cu.
Do these studies show that a GHK-Cu cream works?
No. The studies discussed here were performed in laboratory cell cultures. They do not establish that applying a GHK-Cu cream to human skin produces the same effect.
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 Letters. 1988;238(2):343-346. PMID: 3169264. https://pubmed.ncbi.nlm.nih.gov/3169264/
- Wegrowski Y, Maquart FX, Borel JP. Stimulation of sulfated glycosaminoglycan synthesis by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+. Life Sciences. 1992;51(13):1049-1056. PMID: 1522753. https://pubmed.ncbi.nlm.nih.gov/1522753/
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Explore NeshivaThis article is for general educational purposes and is not medical advice. Research findings discussed here may not apply to a particular skincare product or individual. Treatment decisions should be made with a qualified healthcare professional.