Formulated at the precise concentration proven to deliver maximum amounts of vitamin C to the skin, Serum 20 is now formulated with AOX+ advanced antioxidant technology, combining ferulic acid with 20% L-ascorbic acid to enhance antioxidant performance.

Designed to restore and protect healthy looking skin, lightweight and fast-absorbing Serum 20 AOX+ neutralizes free radicals, defends against environmental damage, and helps prevent premature signs of aging.

Once in the morning after cleansing, apply 4-5 drops to a dry face, neck and chest. Follow with SkinCeuticals Hydrating B5 Gel and a SkinCeuticals moisturizer and sunscreen