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, Restoracell with Copper Peptides, a Great Partner for Microneedling Vitali Skincare Figure 2 from GHK Copper Peptide in Skin Remodeling and Anti Aging ! GHK Cu in Skin Remodeling Semantic Scholar Cellular Glow Copper Peptide GHK Cu Serum for Face Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum