Three antioxidants, 10% stable vitamin C, 1% acetyl zingerone, and 0.5% bis(cyano butylacetate) anthracenediylidene, work across a full exposure cycle to help defend skin against free radical stress from UV, pollution, and blue light. Fragrance-free and hormone disruptor-free. Refill cartridge only, requires the original Day Preventive Treatment glass bottle. 1 fl oz.