GHK Cu for hair loss. Does it actually work? Let the science answer. Hair loss happens when follicles miniaturize, inflammation attacks them, blood supply weakens, and stem cells go dormant. GHK Cu addresses several Ghk Cu Shampoo Copper Peptide Hair Growth Best Peptide for Hair Growth Copper Peptide Shampoo In an adult with pattern hair loss or diffuse thinning and no known copper allergy, what is the recommended firstline topical peptide (copperpeptide, GHKCu) regimen? GHK Cu Hair Growth Hair Growth Serum Intense with Copper Peptide GHK Cu