Eucerin Even Pigment Perfector Serum is a dermatologically tested skincare product designed to target and reduce dark spots and uneven skin tone. This 30ml serum contains patented Thiamidol technology that works at the root cause of hyperpigmentation while perfecting overall skin appearance. This advanced serum formula is part of Eucerin's dermatological skincare line and features their patented Thiamidol ingredient that helps inhibit melanin production - the root cause of dark spots and uneven pigmentation. The lightweight serum absorbs quickly into the skin and can be used under other skincare products. For best results, it should be applied to clean skin before moisturizer, both morning and evening. Visible results can typically be seen within a few weeks of regular use.