Sunday Riley Good Genes All-In-One Lactic Acid Treatment is a powerful serum that helps exfoliate and brighten the skin. It contains lactic acid, an alpha hydroxy acid (AHA), which gently dissolves dead skin cells and promotes cell turnover. This serum also contains licorice extract and lemongrass oil, which help brighten and clarify the complexion. With regular use, it can help improve the appearance of hyperpigmentation, fine lines, and dullness.