1.More About Professional-C Serum 20%
Daily use helps to fortify skin and safeguard your youthful appearance. Formulated with pure L-ascorbic acid to optimize efficacy, permeability, and stability. Obagi Professional-C Serum 20% is the highest concentrated serum with antioxidant L-ascorbic Acid, best suited for normal to oily skin.
2.How to Use
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.
PRECAUTIONS: For external use only. Avoid direct contact with mucous membranes. Some users of this product may experience a slight tingling, which should diminish with continued use. If tingling becomes severe, stop use and consult a doctor.
Storage: Keep out of direct sunlight. Store in a dark, cool place. Keep cap on tightly when not in use.