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 a growing body of peer Copper Peptides (GHK Cu): What They Are, How They Work, and What Evidence Really Shows VIDA Integrative Medicine GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? GHK Peptide Hair Growth Clinical Trial (2016) Research Summary Hairgenetix Peptide Therapy for Hair Growth: Does It Really Work? IK Clinics