The PHA 5% Exfoliating Lip Serum is a chemical lip peel with a particularly gentle active ingredient combination. It contains 5% gluconolactone, a polyhydroxy acid with larger molecular weight that only works on the surface of the skin, making it ideal for sensitive lips. The additional mixture of 1.5% alpha-hydroxy acids enhances the exfoliating effect without stressing the skin barrier. More than 50% glycerin provides intensive moisture and improves the suppleness of the lips, while ectoin stabilizes the skin barrier and supports long-term hydration. The innovative formulation gently promotes the renewal of the skin structure, improves the appearance and texture of the lips over time, and gives them a natural shine. The serum can be ideally used under the Squalane + Amino Acids Lip Balm to remove dry skin particles overnight and provide deep care for the lips. When applied, a slightly tart taste may occur, which is an indication of the active peeling substances.