Copper peptide questions we get asked all the time How often should you use it? Do you need to avoid the sun? If you're new, start once daily (evenings are great), How long does it take GHK Cu to work? Entera Skincare Understanding Peptides: BPC 157, GHK Cu & Beyond Meeting Point Health 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