GHK Cu, a copper peptide, is a naturally occurring peptide made of three amino acids bound to copper that improves collagen production, wound healing, inflammation, and tissue repair. GHK Cu helps with: GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? Figure 2 from GHK Copper Peptide in Skin Remodeling and Anti Aging ! GHK Cu in Skin Remodeling Semantic Scholar GHK Cu Peptides: Unlocking the Copper Peptide Revolution in Skin Care