Our Vitamin C face serum contains Xanthan gum, vitamin C, and castor oil. It can replenish the necessary moisture for the skin, keep the skin moist, and make the skin hydrated and bright. Its use method is very simple: 1. After cleansing, dry the face; 2. Apply appropriate amount of the product evenly on the face; 3. Gently massage with fingertips until completely absorbed. Helps reduce excess oil in the face, shrinks pores, and keeps skin fresh and non-greasy.