Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference Cellular Glow Copper Peptide GHK Cu Serum for Face Two Weeks on GHK CU by Rory Uphold The Ladies Room GHK Cu, the copper peptide, is a game changing injectable for radiant skin and so much more Here's what it can do: Boost collagen for smoother, firmer skin Anti aging