Skin-Glow (GHK-Cu)

Copper tripeptide-1 (Gly-His-Lys : Cu²⁺)

GHK-Cu is a small, naturally occurring copper-binding peptide — three amino acids (glycine, histidine, lysine) bound to a copper ion. First identified in human plasma in 1973, its levels decline with age, which is part of why it has drawn such sustained interest in skin science. It is one of the most extensively studied peptides in the context of skin renewal and tissue remodeling.