Obagi Professional C Serum 10% 30MlObagi Professional C Serum 10% 30ml OBAGI Professional C Serum 10% provides superior antioxidant protection with deep penetration. OBAGI Professional C Serum is suitable for all skin types. Benefits: Formulated for dry, sensitive or reactive skin. Protects from UVA and UVB radiation and contributes to collagen synthesis. How to Use: Apply 5 7 drops to the face, neck and chest using fingertips. Apply to cleansed skin in the morning before sunscreen and