GHK Cu G Lab Peptides GHK Cu 50 mg Copper Peptide Research Grade PRG GHK Cu is a naturally occurring copper binding peptide that plays a major role in tissue repair and remodeling, with a strong focus in research on skin and hair biology. It works by signaling GHK Cu [50mg] Elixser Peptides GHK Cu South Africa Buy GHK Cu Protopep Protopep Research Peptides GHK Cu Research Overview Copper Peptide Studies