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 POLICIES HUMANUPGRADE 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 Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness GHK Cu Peptide: What It Does for Body Composition and Metabolic Health