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 Amazon.com: GHK Cu Peptide Copper Peptides Serum for Face Topical GHKCu with Hyaluronic Acid for Healthy Aging Multi Peptide Formula to Promote Collagen Support Fine Lines Firming Skin Elasticity Hydration : Beauty GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping Some treatments give temporary glow This works deeper GHK Cu Copper Peptide (Prefilled Pen) Designed to support: Collagen production Skin repair & firmness Overall skin & hair quality Doctor guided