Exfoliating is a critical step in skin lightening and brightening because as we age the natural process of cell turnover slows down leaving skin duller, drier, and less smooth; Exfoliates the dead layers of the skin for faster cell turnover; Reduce sensitivity and redness; Azelaïc Acid Helps reduce pigmentation, particularly useful for darker-skinned patients with pigmented acne scars and melasma (pregnancy mask); The application of Deep Exfoliating Mask Sensitive Skin Formulation produces visible effects in one application; Maximum effect will appear after 3 months of continual use one or twice a week