GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link 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 Nanoengineered Self Assembling Peptides with Increased Proteolytic Stability Promote Wound Healing ACS Applied Materials & Interfaces GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack?