GHK-Cu, short for glycyl-L-histidyl-L-lysine copper complex, is a naturally occurring peptide found in the human body. First identified in human plasma in the 1970s, this small molecule has attracted decades of research interest due to its apparent role in tissue repair, skin regeneration, and wound healing. Studies suggest that GHK-Cu levels decline with age, prompting researchers to explore its potential applications in healthy aging and regenerative medicine. One of the mo