Obagi Obagi-C RX System C-Balancing Toner (For Normal to Oily Skin) has the following features: The main ingredient of Hamamelis (Witch Hazel) balances and stabilizes the skin PH value, and restores water and oil balance. Helps promote skin absorption and allows nutrients of the range to penetrate faster into the skin. CAUTIONS : Hydroquinone (HQ) and Tretinoin / Retinol products should not be used by pregnant women, women who intend to become pregnant in the near future, or women who are lactating/breast feeding. Test for skin sensitivity before using by applying a small amount to an unbroken patch of skin and check within 24 hours. Minor redness is not a contraindication, but where there is itching or vesicle formation or excessive inflammatory response, product should be discontinued and physician consulted. Close supervision is recommended. Sunscreen use is an essential aspect of HQ therapy because even minimal sunlight exposure sustains melanocytic activity. Avoid contact with eyes, nose, mouth, or lips. In case of accidental contact, rinse eyes, nose, mouth, or lips with water and contact physician.