GHK Cu and Its Roles in Skin and Hair Transformation Rate Transformation Looksmax Men's Self Improvement & Aesthetics Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Two Weeks on GHK CU by Rory Uphold The Ladies Room GHK Cu Peptides Serum TryDeloura 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