Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals used in various industrial and consumer products. They are known for their water- and grease-resistant properties, making them common in items like non-stick cookware, water-repellent clothing, and food packaging. PFAS are often referred to as "forever chemicals" because they do not break down easily in the environment or the human body. Due to their widespread use, PFAS have been detected in water supplies, soil, and wildlife, raising concerns about potential health effects. Research suggests that exposure to PFAS may be linked to various health issues, including immune system effects and certain cancers. Regulatory agencies are working to assess and manage the risks associated with these substances.