PDF) Effects of GHK Cu on MMP and TIMP Expression, Collagen and Elastin Production, and Facial Wrinkle Parameters GHK Cu Copper Peptide Regeneration, Skin Renewal & Anti Age GHK Cu Hair Growth GHK Cu Peptide Benefits for Skin and Hair LIVV Natural GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not