NUMBUZIN No.4 Ceramide AHA Glazed Skin Prep Serum – highly concentrated active ingredient care. A highlight from the popular NUMBUZIN care series for refined pores and smoother skin. The formula relies on AHA, gluconolactone (PHA, 3%) and ceramides to refine pores and promote smoother skin. This ensures that the skin receives precisely the care it needs with every application. Ideal for sensitive, irritated and redness-prone skin. With regular use, the skin appears visibly cared for, balanced and healthy. Fragrance-free · Skin-friendly formulation · Original K-Beauty from South Korea.