What are the benefits of using ghk cu peptides for health restoration? What is the optimal dosing regimen of GHKCu for topical skincare and woundhealing applications? GHK Cu Copper Peptide Injections: Advanced Skin Rejuvenation 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,