GHK Cu Peptide Therapy Collagen & Skin Renewal GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has GHK Cu Peptide The benefits, side effects, and more [2026] A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend Copper peptides like GHK Cu work by sending signals to your skin to repair, regenerate, and produce collagen. It's not about instant results, it's about improving how your skin functions over time. Dr.