GHK Cu Peptide: Beginner's Guide to Potential Benefits Guide to understanding copper containing peptide serums for skincare (GHK Cu). This is not medical advice and no medical advice is in the comments sections either. My favorite copper peptide serums Peptides have been studied in skin biology for decades because they act as signaling molecules, not fillers or paralytics. In laboratory and clinical research, specific peptides have been shown to activate fibroblasts, GHK Cu Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health