Pizzas, fries, hamburgers—these fast foods are fatty and linked to health issues. But a peer-reviewed study in Environmental Science and Technology Letters uncovers another risk: the grease-resistant packaging used by fast-food chains. These wrappers often contain fluorinated substances, the same chemicals found in waterproof clothing, cookware, and non-stick pans.
Researchers tested 400 fast-food packaging samples and found fluorine—a marker for highly fluorinated chemicals—in nearly 50% of paper containers and 20% of cardboard ones. Tex-Mex items, bread, and desserts showed the highest levels. The U.S. Agency for Toxic Substances and Disease Registry (ATSDR) links these chemicals to developmental delays in children, reduced fertility, higher cancer risk, and thyroid disorders. Sometimes, the packaging is as concerning as the food inside.
