Vitamin C neutralizes free radicals to prevent skin cell damage. Professional strength Vitamin C can give your skin the superior protection it needs to: Prevent premature signs of aging, including fine lines and wrinkles Protect against future damage Stimulate collagen production for firmer, more resilient skin Lighten and brighten skin for more even tone New Obagi Professional-C Serums use advanced scientific formulas developed and tested by leading Vitamin C experts. Obagi Professional-C Serums offer maximum daily antioxidant protection and greater penetration than other Vitamin C products. The greater the penetration, the greater the antioxidant benefit to your skin. Obagi Professional-C Serum uses stabilized ascorbic acid - the only form of Vitamin C that can be effectively absorbed by the skin. You and your Skin Care Specialist can choose from four concentrations to determine which ones right for your skin. Available in 4 different concentration for different skin types and sensitivity levels: Obagi Professional C Serum 5% - For direct application to sensitive eye are skin zone Obagi Professional C Serum 10% - For seriously dry, reactive, and exceptionally sensitive skin types Obagi Professional C Serum 15% - For general or all purpose use of all skin types Obagi Professional C Serum 20% - highest concentration of L ascorbic acid for serious symptoms |