GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK CU Copper Peptide, Face Serum, 1 oz (30 ml) 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 GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or GHK Cu Copper Peptide Collagen Boost & Skin Regeneration Calibrate Hydration