La Roche-Posay Anthelios AOX Daily Antioxidant Serum with Sunscreen SPF 50 is an innovative water-based serum that provides advanced protection to help visibly improve the appearance of fine lines, dark spots, and skin texture. Unique serum texture feels weightless on skin and can be worn alone, with a moisturizer, or under make-up. It is formulated with Cell-Ox Shield® Technology and a potent antioxidant complex of Baicalin, Vitamin C and Vitamin E help protect skin from free radicals caused by UV rays.