A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend In Vitro and in Vivo Studies of pH Sensitive GHK Cu Incorporated Polyaspartic and Polyacrylic Acid Superabsorbent Polymer ACS Omega 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK How much GHK Cu should I inject daily? Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Jumbo Size