The Obagi C Rx System is a prescription-strength skincare regimen that combines the benefits of Vitamin C with Hydroquinone, a powerful skin-lightening agent. In contrast, the Obagi C Fx System is a Hydroquinone-free formula.

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​Obagi-C Rx Systems promote skin rejuvenation from the inside out using a formulation of prescription-strength hydroquinone, 4%, which reduces the appearance of hyperpigmentation, combined with 10% ascorbic acid, a powerful anti-oxidant known to support and defend the skin against future damage.