The Dr. Dennis Gross Skincare Clinical Grade IPL Dark Spot Correcting Serum ($92) is a treatment serum formulated to fade dark spots and even out the skin tone. It contains 10 percent l-ascorbic, kojic acid, azelaic acid, ferulic acid, arbutin, and licorice root extract to help diminish the appearance of hyperpigmentation. It also contains a blend of lactic acid, mandelic acid, and glycolic acid for added exfoliation benefits to reveal brighter and smoother skin. The lightweight serum can be used day and night, but be sure to use sunscreen. It's a strong serum that is great for those with oily to normal skin types, however, if you lean more sensitive you can either use this sparingly or use it as a spot treatment and target specific areas.