My Obagi Nu-Derm clear has turned dark. Is it ok to use?
Safe to Use Obagi Nu-Derm That Turned Dark?
Doctor Answers 2
?Vitamin C Oxidation
This product contains hydroquinone and Vitamin C. Vitamin C is an unstable compound and oxidizes readily. This most likely accounts for the brown discoloration. While I doubt whether it is harmful, it probably has lost some potency. This is a prescription product due to its containing 4% Hydroquinone. It would be a good idea to ask the physician who prescribed it for another bottle if it was received in that condition.
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