GHK Cu Copper Peptide: Dosage, Before and After Results, and How It Works Perfect B GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or GHK Cu Hello Health Services GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration