The Obagi-C Rx Complete System for Normal to Dry Skin is the first and only prescription strength skin care system that combines 4% hydroquinone and professional strength Vitamin C. Vitamin C has been shown to improve elasticity and firmness protect the skin from the environment and prevent the appearance of skin aging. Hydroquinone decreases the formation of melanin in the skin. Melanin is the pigment in the skin that gives it a brown color. Therefore hydroquinone applied topically is used to gradually lighten areas of darkened skin such as freckles age spots chloasma and melasma. As a result of using the Obagi-C Rx Complete System of products your skin will have a more even-toned radiant appearance.Obagi-C Rx Starter Kit contains: C-Cleansing Gel 6.0 fl ozC-Exfoliating Day Lotion 2.0 fl ozC-Clarifying Serum 1.0 fl ozC-Therapy Night Cream 2.0 fl ozC-SunGuard SPF 30 3.0 fl oz1 Clutch bag1 Patient Instructions for Use[]More detail ...