In cosmetics, tranexamic acid is a popular ingredient for treating skin concerns like melasma, hyperpigmentation, and post-inflammatory hyperpigmentation (acne marks). It works by inhibiting melanin production, which reduces dark spots and promotes a more even skin tone, and also offers anti-inflammatory benefits for redness and irritation. It can be found in serums and other topical products, is generally suitable for most skin types, and should be used with sunscreen for best results.