Description: Obagi Professional-C Serum 15% formulation uses stabilized ascorbic acid, the only form of Vitamin C that can be effectively absorbed by the skin. With a concentration of 15% ascorbic acid, this formulation can be used on all skin types. L-ascorbic acid neutralizes free radicals that would otherwise damage your skin, helps stimulate collagen synthesis, provides sun protection, and remains in the skin for up to 72 hours. Professional-C Serums are absorbed into your skin quickly, so you benefit almost instantly after application. Obagi Professional-C Serums offer maximum antioxidant protection you won’t find in other Vitamin C products.

Recommended Use: Apply sufficient amount of the Professional C-Serum to the face, neck and chest using fingertips. Apply to cleansed skin once or twice daily. Apply before any makeup sunscreen or night cream. A slight tingling sensation may occur in some people.