Does it work? Maneup GHK Cu hair growth serum : r tressless GHK Copper (GHKCu) is a naturally occurring tripeptide that acts as a potent signaling molecule for hair regeneration., How it works: GHK Cu enhances hair follicle health by promoting angiogenesis and Ghk Cu Shampoo Copper Peptide Hair Growth Best Peptide for Hair Growth Copper Peptide Shampoo Peptide Therapy for Hair Growth: Does It Really Work? IK Clinics