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 Dimeric copper peptide incorporated hydrogel for promoting diabetic wound healing Nature Communications These are the incredible and visible results of GHK Cu phototherapy patches. No injections (that burn so bad) or nose sprays (that stings) or pills needed (affected by your digestion). Just a patch ! Cellular Glow Copper Peptide GHK Cu Serum for Face