The Inkey List Tranexamic Acid Serum is a spot corrector formulated specifically for hyperpigmentation and melasma on the face. With a formulation of glycerin and water, this serum contains hyaluronic acid as its active ingredient, providing some UVA protection with a rating of 1-star. The product comes in a 1 oz. / 30 ml size and has a period after opening of 6 months. Ideal for all skin types, this all-natural ingredient serum is a great option for those looking to address hyperpigmentation issues.