GHK cu 3% Serum Copper Peptide Glow Peptide (GHK Cu) Mechanism of Action (EN) GHK Cu is a copper peptide that binds to copper ions and delivers them into cells. Copper activates repair genes responsible for collagen, elastin, GHK Cu is one of the most talked about peptides for a reason. Known for its role in skin regeneration, collagen production, and hair support, this copper peptide helps your body do what GHK Cu supports tissue repair and regeneration Protective effects of GHK Cu in bleomycin induced pulmonary fibrosis via anti oxidative stress and anti inflammation pathways ScienceDirect