GHK CU COPPER PEPTIDES TABLETS The Beauty Doctrine GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb GHK Cu is a regenerative copper peptide that supports collagen production and tissue renewal, helping improve your skins firmness, elasticity, and overall quality. It works where true renewal begins: