It has kojic acid, niacinamide and tranexamic acid, which makes it particularly useful for treating melasma,” says Beal.

These serums have potent chemicals that work to control melanin synthesis, lighten existing dark spots, and stop the development of new ones. Otherwise you are literally throwing your money away investing in other skin-care products," she adds. Other noteworthy brightening ingredients are licorice root, golden kiwifruit, and undecylenoyl phenylalanine, which is an amino acid that also hinders the pigmentation process.This intensive serum harnesses the power of tranexamic acid, which is a great ingredient for inhibiting pigment, in tandem with glycolic acid to clear dull/dead skin cells. The molecules penetrate the skin's surface and draw moisture from the environment into the deeper layers of the skin, helping to plump up the skin and improve its overall appearance. Not only does this have an innovative blend of pigment-fighting ingredients such as niacinamide, tranexamic acid and Vitamin C, it also has 173 dissolving micro points to help deliver them to exactly where they’re needed,” says Robinson.

Editor Tip: The star of the formula has to be the brand's patented resorcinol technology, which diminishes the look of dark spots and helps prevent post-inflammatory hyperpigmentation. Caused by the cells responsible for your skin's color, melanocytes, depositing excess pigment into deeper levels of the skin, these forms of discoloration can be incredibly frustrating for those who strive for an even-toned complexion — especially since it can be tough to reverse. But overall, you should be more concerned about your AHAs use if you have sensitive skin or rosacea, so start slow to avoid causing any additional irritation.I have been a longstanding fan of Skinceuticals products and like their Discoloration Defense serum. Why It's Worth It: In addition to kojic acid and niacinamide, the dermatologist-celebrated SkinCeuticals Discoloration Defense contains tranexamic acid. Dispense 2-3 drops onto the palm of clean hand and use fingertips to massage into face and neck until fully absorbed. Though the powerhouse ingredient is used by professionals in chemical peels, it's also available in over-the-counter serums and creams. The star of the formula, azelaic acid "blocks tyrosinase, an essential enzyme for melanin production, and therefore reduces melanin production," he explains, adding that it's one of the few acne-fighting ingredients that are safe to use during pregnancy.