La Roche-Posay has a great line of products made to treat discoloration, but this is an editor favourite for a reason. The lightweight liquid has ferulic acid and lipo hydroxy acid to gently exfoliate your skin while brightening the appearance of dark areas. Though it is slightly pricier than other drugstore products, the long-term benefits of this serum make it totally worth the investment and it's one of the best hyperpigmentation products you can find.