GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health GHK Cu Copper Peptide Hair & Scalp Serum 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 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper AHK Cu Copper Peptide Hair Growth Study (2007) Plain Language Summary Hairgenetix Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum