Copper Peptides: Benefits for Skin and Hair Care, and How to Use Them GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia 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 GHK Cu Focal Point Vitality