GHK Cu Youthful Skin, Healthy Cells, Vibrant You. Copper Peptides (GHK Cu): Benefits and Side Effects Copper Tripeptide (GHK Cu) for Advanced Skincare & Haircare Formulatio GHK Cu is getting a lot of attention right now, and for good reason. This is not just a skin peptide. It's a copper binding tripeptide with documented effects on gene expression, collagen synthesis, 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 New Biotinylated GHK and Related Copper(II) Complex: Antioxidant and Antiglycant Properties In Vitro against Neurodegenerative Disorders