Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum Meet the ingredient your skin has been waiting for. GHK Cu, or Copper Tripeptide 1, is one of the most researched anti ageing actives in skincare. It firms. It renews. It supports collagen. And now Stem Cell Scalp Serum Copper Peptide hair Serum Scalp Treatment Serum Stem Cell Hair Growth Serum Copper Peptide Hair Growth Serum AHK Cu & GHK Cu + Licorice Peptide Labz GHK Cu Copper Peptide Hair Tonic for Fuller Looking Hair 12 Week Supply (30 mL)