89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper GHK Cu is not Botox. It does not freeze a single muscle. It works because it works at the matrix level. GHK Cu stimulates collagen and glycosaminoglycan synthesis, modulates the matrix metalloproteinases that govern GHK Cu Copper Tripeptide 1 Research Reagent Copper peptides like GHK Cu work by sending signals to your skin to repair, regenerate, and produce collagen. It's not about instant results, it's about improving how your skin functions over time. Dr.