Copper Peptide Barrier Cream Yunasence GHK Cu with Ceramides YUNASENCE Copper Peptide Barrier Cream Yunasence GHK Cu with Ceramides YUNASENCE 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 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