What is GHK Cu and Why is Everyone Talking About It? GHK Cu (Copper Peptide) is a powerful, naturally occurring compound in the body that plays a key role in skin health Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb Most people think skincare works at the surface level. But healthy skin function starts much deeper than a temporary glow. GHK Cu is a naturally occurring copper binding tripeptide that is already found GHK Cu Copper Peptide Injections: Advanced Skin Rejuvenation