GHK Copper Peptides for Skin and Hair Defy Medical GHK Cu Scalp Solution Empower Pharmacy What is the optimal dosing regimen of GHKCu for topical skincare and woundhealing applications? 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, What is the recommended dosing for copper peptides injectable?