A study published in Nature Microbiology finds that certain human gut bacteria strains can accumulate per- and polyfluoroalkyl substances (PFAS), persistent environmental toxins known as 'forever chemicals.' These bacteria absorbed 25 to 74 percent of PFAS in lab conditions within 24 hours, suggesting a potential natural mechanism for PFAS excretion. This discovery offers a promising avenue for bioremediation of PFAS exposure in humans.