Copper Peptide (GHK Cu): Clinical Uses, Stability & Compounding Tips 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 Ghk Cu Shampoo Copper Peptide Hair Growth Best Peptide for Hair Growth Copper Peptide Shampoo GHK Peptide Hair Growth Clinical Trial (2016) Research Summary Hairgenetix