After cleansing and toning your face take 2-3 drops of Vitamin C serum on your fingertips with a dropper. Apply it on the face by gently tapping it on the skin. With a circular motion evenly spread the serum and allow your skin to absorb it. It can be applied in the morning and evening. Vitamin C is a proven skin-brightener and antioxidant for decades. However Vitamin C is highly unstable in its purest form and loses its efficacy when exposed to air or light. Formulated with high-grade Vitamin C.