Copper Peptides Before and After: Visible Skin Improvements Explained Hubmed 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 In Vitro and in Vivo Studies of pH Sensitive GHK Cu Incorporated Polyaspartic and Polyacrylic Acid Superabsorbent Polymer ACS Omega GHK Cu copper peptides calm, repair, strengthen If your skin often feels: red or reactive irritated even from gentle skincare tight, dehydrated or burning tired and sensitive