Obagi Progessional-C Serum 10% (1 fl oz ) Your skin deserves all the protection you can give it from daily exposure to the sun’s damaging rays and environmental conditions that cause premature aging. Free radicals dramatically multiply with exposure to sun, air pollution and other environmental assaults, ravaging skin cells and breaking down the collagen that gives skin its youthful resilience. Using stabilized ascorbic acid—the only form of vitamin C that can be effectively absorbed by the skin—Obagi Professional-C Serum provides superior antioxidant protection with deep penetration to the dermal layer. Vitamin C neutralizes free radicals to prevent skin-cell damage. Helps defend against damaging UVA and UVB rays, helps prevent wrinkles, and contributes to collagen synthesis. Lightens and brightens skin for more even tone. Obagi Professional-C Serum 15% is suitable for all skin types. Directions: Apply a few drops to your face, neck, and chest in the morning. If you are using the Obagi-C Rx line, you will want to replace it the C-Clarifying Serum to boost the Vitamin C benefits, but not until after lightening results have been achieved. INGREDIENTS Ascorbic Acid, Propylene Glycol, Water, Propylene Carbonate, Fragrance