![Obagi on Twitter: "The Obagi Professional-C Serums offer Vitamin C in a rich, concentrated formula. They are formulated with 10%, 15%, and 20% L-ascorbic acid – a potent form of Vitamin C – Obagi on Twitter: "The Obagi Professional-C Serums offer Vitamin C in a rich, concentrated formula. They are formulated with 10%, 15%, and 20% L-ascorbic acid – a potent form of Vitamin C –](https://pbs.twimg.com/media/EyZCXSPWEAIXzfT.jpg)
Obagi on Twitter: "The Obagi Professional-C Serums offer Vitamin C in a rich, concentrated formula. They are formulated with 10%, 15%, and 20% L-ascorbic acid – a potent form of Vitamin C –
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Amazon.com: Obagi Vitamin C Serum 10% - Professional C Serum Skin Care – Contains Concentrated L Ascorbic Acid - Helps Minimize the Appearance of Wrinkles, Brightens Skin, and Retains Moisture- 1.0 Fl
![Amazon.com: Obagi Professional C Serum 20%, suero facial de vitamina C con ácido ascórbico concentrado 20% L para piel normal a grasa, 1.0 fl oz, paquete de 1 nombre del producto : Amazon.com: Obagi Professional C Serum 20%, suero facial de vitamina C con ácido ascórbico concentrado 20% L para piel normal a grasa, 1.0 fl oz, paquete de 1 nombre del producto :](https://m.media-amazon.com/images/I/611aUnLqegL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Obagi Professional C Serum 20%, suero facial de vitamina C con ácido ascórbico concentrado 20% L para piel normal a grasa, 1.0 fl oz, paquete de 1 nombre del producto :
![Amazon.com: Obagi Professional C Serum 20%, suero facial de vitamina C con ácido ascórbico concentrado 20% L para piel normal a grasa, 1.0 fl oz, paquete de 1 nombre del producto : Amazon.com: Obagi Professional C Serum 20%, suero facial de vitamina C con ácido ascórbico concentrado 20% L para piel normal a grasa, 1.0 fl oz, paquete de 1 nombre del producto :](https://m.media-amazon.com/images/I/61dOZuDRwrL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Obagi Professional C Serum 20%, suero facial de vitamina C con ácido ascórbico concentrado 20% L para piel normal a grasa, 1.0 fl oz, paquete de 1 nombre del producto :
![Amazon.com: obagi Vitamin C Serum 15% - Professional C Serum Skin Care – Contains Concentrated L Ascorbic Acid - Helps Minimize the Appearance of Wrinkles, Brightens Skin, and Retains Moisture- 1.0 Fl Amazon.com: obagi Vitamin C Serum 15% - Professional C Serum Skin Care – Contains Concentrated L Ascorbic Acid - Helps Minimize the Appearance of Wrinkles, Brightens Skin, and Retains Moisture- 1.0 Fl](https://m.media-amazon.com/images/I/319td3+hN6S._AC_.jpg)