Alto Advanced Defense and Repair Serum has two patented protectors in one clinically proven breakthrough to provide the most advanced and comprehensive antioxidant protection and repair available. It is the new gold standard in comprehensive (environmental and intrinsic) antioxidant defense offering all of the benefits of Alto Defense Serum combined with a new and ground-breaking, super-potent antioxidant. It improves skin brightness, redness, overall tone and texture as a result of free radical damage from environmental and intrinsic stressors