GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? What is the safe topical dosing, duration, and contraindications for the copperbinding peptide GHKCu for wound healing or antiaging? GHK Cu Copper Peptide in LA 3,356+ Reviews Molecular crystal structure of the tripeptide GHK Cu. In solution, Download Scientific Diagram Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms GHK Cu is a naturally occurring tripeptide in human plasma. Levels average 200 ng ml at age 20 and drop to 80 ng ml by age 60 (Pickart et al., 2020). That decline tracks with