OPULUS Clarifying Azelaic Acid Concentrate improves problem skin. The concentrate features Azelaic, Tranexamic, Kojic Acid, Resveratrol, and Pterostilbene. The daily moisturizer assists in soothing and firming skin. It leaves the complexion looking brighter, clearer, and more even. This concentrate is meant to be used only with the OPULUS Activator, which is sold separately.