GHK-Cu is the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine, an endogenous peptide first isolated from human plasma. Plasma levels decline with age.

In research it has been studied for effects on skin remodeling, fibroblast activity, collagen and glycosaminoglycan synthesis, wound healing, and modulation of gene expression — including studies showing changes in the expression of large numbers of genes in cultured cells.

It is used as a research tool in studies of skin biology, wound repair, and copper-peptide interactions.

For research purposes only. Not for human consumption.