GHK-Cu and Copper Peptides in Skin Research

GHK-Cu is a copper-binding tripeptide that is widely referenced in skin and cosmetic-science research. As a small, well-characterised sequence, it is a popular reference standard in laboratory work.

What is GHK-Cu?

GHK is a naturally occurring tripeptide (glycyl-L-histidyl-L-lysine). In its copper-complexed form, GHK-Cu, the peptide is bound to a copper ion — the form most studied in the literature. Its distinctive blue colour in solution comes from that copper complex.

Research interest

Copper peptides are examined in a range of skin-science and extracellular-matrix research models. Investigations are exploratory and conducted in vitro or in other non-human systems. HK Peptide lists sequences of this type under skin, hair & tanning research.

Handling copper peptides

Because the copper complex is central to GHK-Cu’s identity, careful handling and correct storage preserve the intended form. As with other lyophilised peptides, keep material cold, dry and protected from light until reconstitution, and confirm identity against the certificate of analysis.

Purity considerations

Small peptides still require the same analytical rigour as larger sequences — HPLC purity and mass-spectrometry identity remain the standard for dependable research material.

Frequently asked questions

What is GHK-Cu?

GHK-Cu is the copper-complexed form of the tripeptide GHK (glycyl-L-histidyl-L-lysine), widely used as a reference standard in skin-science research.

Why is GHK-Cu blue?

The characteristic blue colour in solution comes from the bound copper ion that defines the GHK-Cu complex.

Is GHK-Cu sold for cosmetic or human use here?

No. It is supplied as a research reference standard for laboratory use only.

Every HK Peptide reference standard is HPLC-verified with third-party Janoshik lab reports available on request. Browse the full catalogue or view our certificates of analysis.