Topical GHK Cu: Skin Benefits, Best Forms, and Where to Buy What is GHK Cu? LIVV Rosacea isn't just about rednessit's often a sign of a compromised skin barrier and ongoing inflammation. When the barrier is weakened, skin becomes more reactive: Increased sensitivity Higher transepidermal water Best Repairing Blue Copper Peptide Serum Anti Wrinkle Skin Face Ghk Cu Peptide Blue Copper Peptide Serum and Ghk Cu price 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