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 Understanding Hair's Natural Life Cycle: Anagen, Catagen, Telogen Zenagen Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides Anagen Phase of Hair Growth GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health