GHK Cu is more than a skincare trend its a copper peptide involved in repair, regeneration, and cellular signaling., This peptide has been studied for its connection to collagen production, skin Enhancement of collagen deposition and cross linking by coupling lysyl oxidase with bone morphogenetic protein 1 and its application in tissue engineering Scientific Reports JCI 11 Hydroxysteroid dehydrogenase blockade prevents age induced skin structure and function defects Lysyl oxidase Wikipedia