GHK-Cu (Copper Tripeptide-1) — glycyl-L-histidyl-L-lysine complexed with cupric ion (Cu2+). Reference standard for in-vitro collagen synthesis modulation, matrix metalloprotease (MMP) activation, and angiogenesis pathway research. Lyophilized. >99% HPLC purity. For research use only (RUO). Not for human or veterinary use.