The Obagi Professional C Serum is a powerhouse of vitamin C and antioxidants that helps brighten skin tone and reduce signs of past skin damage. This powerful serum is made with 15% pure L-ascorbic, the industry’s gold standard of vitamin C, to help defend skin all day from free radicals. Use it to help achieve a healthy-looking complexion that's free of blemishes and wrinkles. So, whether you're fighting the signs of aging or seeking to restore the glow of youth, trust the Obagi Professional C Serum to help you achieve your goals. Works to brighten skin tone Reduces the signs of past skin damage Protects your skin from free radicals Restores the skin glow