Kiehl’s Clearly Corrective Dark Spot Solution is a fast acting, exceptionally effective serum developed specifically for those facing loss of skin clarity along with discoloration or hyper pigmentation concerns. Today, Clearly Corrective Dark Spot Solution is Kiehl’s #1 best-selling product worldwide. The product boasts impactful clinical results that measure multiple dimensions of skin clarity including visibly reducing the number of dark spots, boosting luminosity, and improving uneven skin tone – with the results of these three attributes doubling between either and twelve weeks of usage. Ingredients include Activated C, a form of Vitamin C that is fast-acting and that can help reduce the intensity and appearance of existing discolorations. It penetrates skin quickly to help visibly even skin tone and improve clarity and Buffered Salycilic Acid in the formula which along with Activated C works to visibly reduce discoloration and renew skin texture.