Per- and polyfluoroalkyl substances (PFAS)—a vast family of chemicals used largely for their nonstick, water-repellent and grease-resistant properties—are called "forever chemicals" because of their remarkable resistance to degradation. They are now ubiquitous in our environment.
Source: [Phys.org](https://phys.org/news/2026-10-food-reveals-diet-exposure-chemicals.html)