Dermatological and environmental…zone/benzophenone-3.

About 97% of people tested have oxybenzone in their urine, and it's showing up in waterways and fish worldwide. The ingredient can trigger allergic reactions, may disrupt hormones, and has been linked to a serious birth defect. In the environment, it's killing coral reefs and fish—and when it breaks down in chlorinated pools, it creates toxic byproducts that water treatment plants can't effectively filter out.