Keck School of Medicine of USC Oct 17 2024 New research has revealed that the connection between per- and polyfluoroalkyl substances, or PFAS, and kidney damage may be tied to dysregulation of the gut microbiome , which is made up of bacteria and other microorganisms that live in the digestive tract. PFAS are manufactured chemicals used in a wide range of products, including everything from furniture to food packaging. They are often called "forever chemicals" because once they accumulate in