GHK-Cu (Copper Tripeptide-1) is a naturally occurring peptide complex first identified in human plasma, recognised for its affinity to copper ions and involvement in peptide-mediated biological signalling.

It is widely studied in preclinical research models examining cellular signalling behaviour, peptide–metal interactions, and gene expression pathways under controlled laboratory conditions. Its copper-binding properties contribute to its stability and continued relevance in studies focused on cellular organisation and structural protein interactions.

Due to its copper-bound structure, GHK-Cu typically presents as a distinct blue lyophilised compound — a characteristic inherent to the peptide complex.

Supplied in lyophilised form, each vial is prepared to support precise handling, stability, and reproducibility in laboratory settings.