A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Ghk Cu Peptide Before And After Pictures 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 Two Weeks on GHK CU by Rory Uphold The Ladies Room GHK Cu Glow Peptide Stack for Skin Rejuvenation Jennifer R. Berman MD Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare