GHK Cu (Copper Peptide) is a naturally occurring substance in the body made of a small protein (peptide) and copper. In simple terms, GHK Cu helps the body repair and renew itself. As we Natural Copper Peptide Serum Booster GHK Cu Proven Research Guide 2026 PSPeptides Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link