GHK Cu Glow Peptide Stack for Skin Rejuvenation Jennifer R. Berman MD GHKCU Peptide Therapy Relive Health Houston, TX 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 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