New In Box Sealed Obagi Professional-C Vitamin C Serum 20% Helps Brighten Skin Tone and Minimize the Appearance of Fine Lines & Wrinkles – Safe for Sensitive Skin Best suited for normal to oily skin. Supercharge Your Glow: Harnessing the power of L-ascorbic acid, the industry's gold standard of vitamin C our highest concentrated serum helps brighten skin tone, reduce signs of past skin damage and minimize the appearance of fine lines & wrinkles Highly Concentrated Vitamin C: Known as the purest form of Vitamin C, L-ascorbic Acid is formulated at pH levels shown to optimize stability, permeability, and efficacy to help neutralize free radicals and fortify the skin barrier defenses Clinically Tested: 91% of users reported skin appeared bright and more hydrated in a consumer study, data on file at Obagi Cosmeceuticals LLC Dermatologist Tested, Physician Endorsed: Formulated with the purest, most effective ingredients, our portfolio of products are dermatologist tested and physician endorsed; that’s why professionals trust us to provide superior skincare for their patients 35 Years of Transformational Skincare: From being the first to clinically test our products on all skin types & tones, to setting the standard for medical-grade skincare, we’re proud to bring you effective & transformative solutions for every step of your skincare journey.