GHK-Cu
Endogenous tripeptide glycyl-L-histidyl-L-lysine forming a high-affinity complex with Cu2+. Studied across three primary research axes: collagen synthesis in dermal fibroblasts, wound healing signalling (VEGF, keratinocyte/fibroblast migration), and anti-inflammatory NF-κB pathway inhibition. Plasma GHK levels have been reported to decline with age.
Mechanism of Action
GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine. The tripeptide forms a stable, high-affinity complex with Cu2+ through a square planar coordination involving the α-amino group of glycine, the amide nitrogen of the Gly-His peptide bond, and the imidazole nitrogen of histidine. This coordination chemistry is what distinguishes GHK-Cu from the free tripeptide and is central to its studied biological activity.
The first and most extensively studied mechanism is collagen synthesis upregulation. Published fibroblast cell culture work has described GHK-Cu exposure increasing transcription of collagen type I and type III genes, alongside matrix metalloproteinases (MMP-1, MMP-2) involved in tissue remodelling and scar reduction. The net effect studied is enhanced collagen turnover and remodelling rather than simple collagen accumulation, which is relevant to wound repair and dermal tissue research.
The second research axis is wound healing signalling. GHK-Cu has been studied for stimulating keratinocyte migration, fibroblast proliferation and migration, and VEGF (vascular endothelial growth factor) upregulation in endothelial cells, leading to enhanced angiogenic sprouting into wound beds. These cellular effects collectively address multiple aspects of the wound healing cascade studied in preclinical repair models.
The third mechanism under investigation is anti-inflammatory signalling through NF-κB pathway inhibition. Published in vitro and in vivo studies describe GHK-Cu reducing nuclear translocation of NF-κB and downregulating pro-inflammatory cytokines including TNF-α and IL-6. GHK-Cu also functions as a copper chaperone, delivering Cu2+ to enzymes requiring copper as a cofactor, including lysyl oxidase (critical for collagen and elastin crosslinking), with implications for extracellular matrix structural integrity research.
Key Research Findings
- Pickart and colleagues established GHK’s biological activity through decades of wound healing research, with collagen-stimulating effects documented in fibroblast cultures and published across multiple journals including Journal of Biomaterials Science during the 1990s–2000s. Pickart and Margolina, BioMed Research International, 2015.
- VEGF upregulation and angiogenic sprouting in endothelial cell cultures following GHK-Cu exposure have been described in published in vitro work, supporting a vascular mechanism for accelerated wound healing observed in preclinical models. Pickart research group, in vitro copper peptide angiogenesis literature, 1990s–2010s.
- Dermal collagen density and extracellular-matrix remodelling effects following topical copper-peptide application have been reported in published dermatology research over the period 1990–2010, with multiple investigator groups contributing data on topical application of copper peptide formulations. Pickart and Margolina, clinical dermatology and copper peptide literature, 1990–2010.
- Anti-inflammatory and NF-κB inhibitory effects have been described in multiple preclinical studies, including reduction of TNF-α, IL-6, and IL-1β in stimulated cell culture models. Pickart research group, anti-inflammatory copper peptide literature, 2000s–2010s.
- Gene expression profiling showing GHK-Cu modulation of hundreds of genes in human fibroblast cultures — including genes related to inflammation, oxidative stress, and tissue remodelling — has been published by Pickart and Margolina groups using microarray analysis. Pickart and Margolina, fibroblast gene expression profiling literature, 2010s.
Citations last reviewed: 1 October 2026
As Supplied by BasedPeps
Researcher FAQ
What is GHK-Cu?
GHK-Cu is the Cu2+ complex of the endogenous tripeptide glycyl-L-histidyl-L-lysine (GHK). The tripeptide forms a high-affinity complex with Cu2+ through the imidazole of histidine and the amino terminus of glycine. The complex is studied for collagen synthesis stimulation in dermal fibroblasts, wound healing signalling, and anti-inflammatory NF-κB pathway modulation. Plasma GHK levels have been measured in human subjects and have been reported to decline with age.
How is GHK-Cu different from GHK?
GHK is the free tripeptide; GHK-Cu is the copper complex. The biological activity described in published research is primarily attributed to the complex, not the free peptide. The Cu2+ ion coordinated by the tripeptide is essential for studied functions including copper chaperone delivery to Cu2+-dependent enzymes such as lysyl oxidase (required for collagen crosslinking) and cytochrome c oxidase.
What role does copper play in the GHK-Cu complex?
Copper (Cu2+) in the GHK-Cu complex serves multiple studied functions: it is required for the biological activity of the complex itself; and GHK acts as a copper chaperone, delivering Cu2+ to enzymes requiring copper as a cofactor, including lysyl oxidase (critical for collagen and elastin crosslinking), ceruloplasmin, and cytochrome c oxidase in the mitochondrial respiratory chain.
How is GHK-Cu reconstituted and stored?
GHK-Cu is supplied as a slightly blue lyophilised powder (due to Cu2+ coordination). Stored at −20 °C. Reconstitution in sterile water or appropriate buffer is standard for research use. Reconstituted solution stored at 2–8 °C and used within 28 days per experimental protocol.
Does BasedPeps provide purity documentation?
Yes. Every BasedPeps lot includes a third-party Certificate of Analysis documenting HPLC purity (≥99%) and mass spectrometric identity confirmation. Certificates of Analysis are available per batch on request.
View BasedPeps GHK-Cu
Research-grade copper-tripeptide complex. Third-party HPLC and mass spectrometry verification per lot. Certificate of Analysis available on request. Dispatched from Riga, Latvia within 24 hours.
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