Obagi® C- Clarifying Serum (normal to oily)

 Contains 4% hydroquinone to reduce hyperpigmentation and other key ingredients, such as Vitamin C, to maintain the appearance of aging skin. HYDROQUINONE 4% Strong inhibitor of melanin production that has long been established as the most effective ingredient for reducing and potentially eliminating melasma. L-ASCORBIC ACID 10% Known as the purest form of Vitamin C, L-ascorbic Acid helps neutralize free radicals, minimize the look of fine lines and wrinkles, and brighten skin tone. Each gram of Obagi-C Rx C-Clarifying Serum - Normal to Oily contains the following ingredients. ACTIVE INGREDIENT: hydroquinone, USP 4% (40 mg/g) INACTIVE INGREDIENTS: water (aqua), propylene glycol, alcohol denat., dipropylene glycol, ascorbic acid, propylene carbonate, sodium lauryl sulfate, fragrance