GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu as a multifunctional copper peptide: synthesis routes, process engineering and emerging applications Systems Microbiology and Biomanufacturing Springer Nature Link