GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu Copper Peptide Hair Tonic for Fuller Looking Hair 12 Week Supply (30 mL) GHK Cu Copper Peptide Cream (Prescription) UluRx 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 Cu Peptide Before and After: What to Expect for Skin and Hair