GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn Can a patient with a history of liver or kidney disease, such as Wilson's disease or hemochromatosis, overdose on copper from Gly His Lys Copper (GHK Cu)? GHK Cu Copper Peptide Regeneration, Skin Renewal & Anti Age