You started using a GHK Cu peptide serum on your face and now , The things no one tells you., Yes, the injections can hurt like a bitch. , Heres the thing Ive found it works even better topically, Cellular Glow Copper Peptide GHK Cu Serum for Face GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B 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