Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides Copper Peptides True Hair Growth Serum Based on the Anela Protocol Ghk cu Ahk cu 30ml (1 Fl.oz) Etsy Ahk Copper Peptide Serum Etsy AHK Cu vs GHK Cu Difference Between GHK Cu and AHK Cu Ahk Cu Vs Ghk Cu Comparison Hair Growth Skin Benefits