Obagi Professional-C®, Serum 20%, 1 fl oz (30 ml)

• 20% L-Ascorbic Acid
• Vitamin C Serum 

Obagi® Professional-C Serum contains the L-ascorbic acid form of vitamin C, a potent antioxidant. The 20% L-ascorbic acid helps brighten the skin and minimize the appearance of fine lines and wrinkles. Best suited for normal to oily skin. 

Apply 5 to 7 drops of Obagi Professional-C Serum to the face, neck and chest using fingertips. Apply to cleansed skin in the morning before sunscreen or makeup application.