Tightens pores and promotes more even skin tone while hydrating dry skin. Absorbs excess oil and restores pH balance. Directions For Use: At night only following use of Optimal Cleanser, spray Optimal Toner onto hands or cotton pad and apply to face and neck. A tingling sensation may be experienced; however, discontinue use if discomfort occurs. Not recommended for highly sensitive skin. Avoid eye area. A sunscreen must be worn when using a glycolic acid product. Suggest daily use of Donell Sunscreen with SPF 25.