OBM Geriatrics The Effect of the Human Plasma Molecule GHK Cu on Stem Cell Actions and Expression of Relevant Genes The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline Innovation meets biology GHK Cu is a naturally occurring copper peptide studied for its role in skin health, collagen support, and tissue repairmaking it a powerful tool in next generation peptide science. Precision. GHK Cu Revival Clinic GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect