The Inkey List Powerful Ingredients, Real Results. 2% Tranexamic Acid helps reduce hyperpigmentation, Acai Berry extract promotes even skin tone and Vitamin C gives skin a boost of radiance. How To Use It. AM and PM after cleansing and applying a hydrating serum, use a pea-sized amount of Tranexamic Acid Serum on the face and neck. Wait 30 minutes ..