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 (copper peptide) used topically is one of the most well studied skin repair peptides. Here's how it helps the skin, in practical terms: 1. Boosts collagen & elastin GHK Cu signals your skin Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare GHK Cu is the skin + hair regeneration peptide everyone's talking about! GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia