Three antioxidants — 10% stable vitamin C, 1% acetyl zingerone, and 0.5% bis(cyano butylacetate) anthracenediylidene — work across a full exposure cycle to prevent, absorb, and repair free radical damage from UV, pollution, and blue light. Fragrance-free, hormone disruptor-free, and verified by the Credo Clean Standard. Refill cartridge only — requires the original Day Preventive Treatment glass bottle. 1 fl oz.