PCA Skin ExLinea® Pro Peptide Serum dramatically reduces the appearance of fine lines and wrinkles. Dramatically minimize the appearance of deep-set expression lines with this advanced neuropeptide treatment. We often make the same facial movements repeatedly, leading to expression lines around the forehead, eyes and mouth. This targeted treatment is formulated with the proprietary Peptide-Pro Complex, a powerful blend containing four unique ingredients that work together to help relax facial muscle contractions and reduce the appearance of visible expression lines.