GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration GHK Cu: The Peptide That Supports Healthy Aging GHK Cu (copper peptide) is naturally occurring in the body and plays a role in supporting skin health, collagen production, and tissue repair. As Copper Peptide Hair Growth Treatment GHK cu, AHK cu, Licorice Root Extract, Ginseng Root Extact