Brightening Serum 1 fl.ozClinically proven to decrease the intensity of pigmented areas by 75% in only 3 months, iS Clinical Brightening Serum (formerly known as "White Lightening Serum") is the key to unlocking even, brighter skin. This lightweight serum inhibits the darkening of spots, provides controlled exfoliation, and gently resurfaces the skin without causing inflammation. A highly active blend of Norwegian sea kelp extracts and powerful botanical acids lighten as well