I have used this product for about 3 weeks consistently and unlike other brightening serums, I see no difference. It is also very drying.
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Obagi Professional-C Serum 5% Strength Review #2
Pros: lightweight, absorbs quickly
Ease of Use
C-Serum by Obagi
-July 12, 2011
I like Obagi products. They are high quality and seem to make a difference in my skin if used on a regular basis. This Serum is very light, dries quickly and makeup can be applied immediately after applying the Serum.