A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend 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 Copper Peptide Barrier Cream Yunasence GHK Cu with Ceramides YUNASENCE Organic Copper Peptide Serum Firming & Smoothing Unscented Mitigating GHK Cu Injection Pain: Tips and Tricks Gabriel Alizaidy, MD, MS posted on the topic LinkedIn