GHK Cu: The Regenerative Peptide for Skin, Hair, and Healing Pulse & Remedy GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? 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: 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