Alpha arbutin is a skincare ingredient commonly used to improve the appearance of hyperpigmentation and uneven skin tone. It works by inhibiting tyrosinase, an enzyme involved in the production of melanin.
With consistent use, alpha arbutin may help reduce the appearance of dark spots, post-acne marks, and areas of uneven pigmentation without changing the skin's natural color.
Because pigmentation can be worsened by UV exposure, daily sunscreen is particularly important when trying to improve dark spots.