iS Clinical White Lightening Serum 0.5 oz. is an advanced skin care product that is a key to unlocking even, bright skin. This serum inhibits melanin production which is the substance that is responsible for pigment. This serum produces professional skin lightening effects and helps prevent discoloration from occurring. This lightweight serum provides controlled exfoliation and gently resurfaces the skin without causing inflammation. It is also known for its anti-aging benefit -- the smoothing out of your skin and the reduction in the appearance of fine lines and wrinkles.