Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics GHK CU (a copper peptide) is naturally found in the human body and is studied for its involvement in skin integrity, tissue repair signaling, and cellular regeneration. Research commonly explores its relationship to: 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 Peptides: Topical vs Injectable