SkinBetter Science® Alto Advanced Defense & Repair Serum is a super-potent antioxidant serum formulated to shield the skin against the effects of internal and external free radicals. Powered by a combination of two proprietary technologies, this serum goes beyond Vitamins C and E, incorporating 17 additional antioxidants to provide comprehensive defense. It helps improve the appearance of skin dullness, redness, and overall tone and texture, resulting in brighter, more radiant-looking skin.