Three amino acids. One copper ion. Decades of research. What makes GHK Cu relevant: 1.Extracellular matrix signaling and collagen pathways 2.Gene expression modulation across tissue models 3.Oxidative stress response mechanisms 4.Cellular repair and GHK Cu Hyaluronic Acid Gel Wells Pharmacy Network The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline 89030 95 5 GHK Cu Gly His Lys Cu Copper Tripeptide 1; Prezatide copper