A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend GHK Cu is a powerful copper peptide that supports collagen production, skin and hair health, and tissue repair. It may help reduce fine lines, improve elasticity, and promote faster healing. Want to learn GHK Cu: Skin Benefits GHK Cu is a copper peptide studied for its role in supporting collagen production, skin repair, and anti oxidant activity. Research suggests it may help improve skin firmness, elasticity, and overall GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B