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Obagi Professional-C Serum 20% is the highest concentrated serum with antioxidant L-Ascorbic Acid, best suited for normal to oily skin.
Uniquely formulated to help reduce the appearance of skin aging and leave skin feeling silky soft. Daily use helps to fortify skin and safeguard your youthful appearance. Formulated with pure L-ascorbic a
4.5
170 ratings
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Hands down this is the best vitamin C serum I have ever used! I have been using it for years as a daily foundation for my skin. It’s a nonnegotiable for me. Nothing else is close.
Kathryn · September 25, 2026
Love it!
This is the best Vitamin C serum I've used, and it also smells amazing!
S
Sam · Yesterday
A staple for me !!!! I have been using Obagi products for 25 years. I have this in auto ship.