Right, let's talk about GHK Cu which sounds like a Wi Fi password but is actually your body's built in regeneration switch. Think of it as the Tony Stark of peptides: brilliant, blue, and Cellular Glow Copper Peptide GHK Cu Serum for Face What is GHK Cu and Why is Everyone Talking About It? GHK Cu (Copper Peptide) is a powerful, naturally occurring compound in the body that plays a key role in skin health GHK Cu Peptide: Turn Back the Clock Naturally Calibrate Hydration