GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect Hair Growth Serum Intense with Copper Peptide GHK Cu Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density. Copper Peptide Hair Growth Serum (GHK Cu & AHK Cu) Copper Peptide Hair Growth Treatment GHK cu, AHK cu, Licorice Root Extract, Ginseng Root Extact