In Vitro and in Vivo Studies of pH Sensitive GHK Cu Incorporated Polyaspartic and Polyacrylic Acid Superabsorbent Polymer ACS Omega Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Two Weeks on GHK CU by Rory Uphold The Ladies Room Peptide Therapy for Pain Management and Healing Core Medical & Wellness 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