The Obagi Professional-C Serum 10% is a formulation that uses stabilized ascorbic acid . This product contains a form of Vitamin C that that can be easily absorbed by the skin. For those who have dry, sensitive, or reactive skin this product will protect your skin from collagen synthesis and the sun. This serum can last up to 72 hours in your skin.

• Apply to cleansed face, neck and chest using fingertips. Once or twice daily. Apply before any makeup sunscreen or night cream. A slight tingling sensation may occur in some people.

Ascorbic Acid, Propylene Glycol, Water, Propylene Carbonate, Fragrance