GHK Cu (Copper Peptide) Deep Dive: Mechanisms, Benefits, Risks, Forms, & Dosing Molecular structure of the tripeptide GHK Cu. In solution lysine Download Scientific Diagram The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget Copper Peptide (GHK Cu): Clinical Uses, Stability & Compounding Tips Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference