GHK Cu Peptide: Turn Back the Clock Naturally Calibrate Hydration 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 Peptide Therapy & Cycling Protocols Balanced Aesthetics GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not