Copper, Collagen, and Controversy: Inside the GHK Cu Buzz GHK Cu and Erectile Dysfunction: What the Evidence Actually Shows The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget Dimeric copper peptide incorporated hydrogel for promoting diabetic wound healing Nature Communications The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds,