eCosmetics is an authorized retailer of Obagi.u00a0Supercharge your glow with our Professional-C Serum 10%, made from the industry's gold standard of vitamin C. This powerful daily antioxidant serum made with 10% L-Ascorbic Acid is effective in defending the appearance of fine lines, wrinkles and photoaging of the skin, while also working to neutralize free radicals and environmental stressors.