This concentration integrates two formulas and contains abundant probiotic extracts. Blue serum contains pure antioxidants in ferric acid and vitamin E, which can make your skin look softer, brighter and younger. Using this can reduce the appearance of aging. It is suitable for all skin types, even sensitive skin. For the first time, push the cover and turn it clockwise to release the blue focus at the center of the base. Then, replace the cap with the dropper. Before placing this center, gently shake the bottle until the two centers are mixed. Put it on your face and neck every night.