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.

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 ton