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GHK-Cu and AHK-Cu are often grouped together as copper-peptide complexes, but they are not the same molecule. They differ in amino-acid sequence and in the research focus of their literature.
What is GHK-Cu?
GHK-Cu is a complex of the tripeptide glycyl-L-histidyl-L-lysine (GHK) with a copper ion. It is studied in the context of fibroblasts, the extracellular matrix, tissue remodelling and dermal cell models.
PubMed review of GHK and skin biology
What is AHK-Cu?
AHK-Cu is another copper tripeptide complex. Published research includes dermal papilla cells and hair follicle models. One frequently cited study tested AHK-Cu on isolated follicles ex vivo and on dermal papilla cells in vitro.
PubMed: AHK-Cu and dermal papilla cells
Key differences
| GHK-Cu | AHK-Cu | |
|---|---|---|
| Type | Copper tripeptide complex | Copper tripeptide complex |
| Broader literature focus | Fibroblasts, matrix, tissue remodelling, dermal biology | Hair follicle, dermal papilla cells, copper signalling |
| Extent of literature | Broader base of preclinical and review papers | Narrower, more specific experimental literature |
Why they should not be treated as equivalent
The shared “Cu” label means both compounds include copper, but a different peptide sequence means different interactions, stability and experimental context. Data for one molecule should therefore not automatically be attributed to the other.
Related profiles
See GHK-Cu, AHK-Cu and the Dermal and follicular models collection.
This text is intended for scientific and educational context. It does not make claims about the properties of any specific batch and is not an instruction for use in humans or animals.