Obagi-C Rx C-Clarifying Serum*Call to purchase* A prescription strength serum that evens skin tone and reduces the appearance of fine lines and wrinkles, formulated for normal to oily and combination skin. With a patented, prescription strength combination of 10% Vitamin C and 4% hydroquinone, this powerful twice daily serum works to promote more evenly toned skin while reducing the appearance of fine lines and wrinkles. Use it alone or with the complete Obagi C Rx regimen for