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.

Researchers reviewed existing data on oxybenzone exposure in humans (including CDC testing results) and examined documented cases of allergic reactions, health effects, and environmental contamination in waterways and marine life.

Funding not disclosed in abstract