Obagi C-Clarifying Serum. The first and only prescription-strength 4% Hydroquinone and Vitamin C Serum. It penetrates deep into the skin’s dermal layers, where it enhances collagen production and reduces melanosome activity and tyrosinase activation. The skin is smoother and brighter.
Each gram of Obagi-C Clarifying Serum contains:
- Hydroquinone 4% USP mg/gm in a base of Propylene Glycol Propylene Carbonate L-Ascorbic Acid (Vitamin C) Purified Water and Sodium Lauryl Sulfate