Why does Glycyl Histidyl Lysine Copper (GHK Cu) cause pain or discomfort? GHK CU Crepey Skin Escape Platinum Skin Care 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 If your GHK injection site gets irritated try this 1. Dilute it by adding more water to the syringe 2. Let it sit until it reaches room temperature Also, make sure you're GHK Cu (Copper Peptide) Deep Dive: Mechanisms, Benefits, Risks, Forms, & Dosing What Is GHK Cu? The Copper Peptide That Rejuvenates Skin