SkinCeuticals Discoloration Defense Serum is a powerful, multi-phase treatment clinically proven to minimize the appearance of various types of skin discoloration, such as brown patches and lingering post-blemish marks. This serum features a unique blend of key ingredients: 1.8% Tranexamic Acid to soothe skin and support the natural skin barrier, 5% Niacinamide to reduce the appearance of pores and fine lines while combating dullness, and 5% HEPES for gentle exfoliation to promote an even skin tone. The lightweight formula corrects dark spots and fights other areas of discoloration for a more radiant, healthy-looking complexion. Ideal for layering with other skincare products, it leaves skin revitalized and balanced.