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 100mg Laboratory Research Compound Rex Research GHK Cu 200mg Peptides World GHK Cu 100MG NuRev Peptides GHK Cu 50 mg Copper Peptide Research Grade PRG GHK Cu Research Overview Copper Peptide Studies