A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend The Benefits & Risks of GHK Cu (WATCH BEFORE TAKING) Meet GHK Cu, the peptide designed to help your skin repair itself. From supporting collagen to promoting hair growth, this "Copper Peptide" offers powerful benefits for your wellness routine. Check out the details GHK Cu Copper Peptide: The Ultimate Peptide For Longevity The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline