GHK Cu Copper Peptide Hair Tonic for Fuller Looking Hair 12 Week Supply (30 mL) Natural Copper Peptide Serum Booster Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum Copper TriPeptide 1, A miracle ingredient that helps restore hair growth from the roots. Try KERAGENE Hair Growth Booster serum with GHK Cu aka Copper TriPeptide 1 in its more effective form to accelerate hair