GHK-Cu, also known as Copper Peptide GHK-Cu or Glycyl-L-Histidyl-L-Lysine-Copper(II), is a tripeptide complex composed of the amino acids glycine, histidine, and lysine, combined with copper ions. It has gained attention for its potential anti-aging and skin regeneration properties. GHK-Cu is believed to stimulate collagen and elastin production, promote wound healing, and possess antioxidant and anti-inflammatory effects. Due to these properties, it is commonly used in skincare products and cosmetic formulations.