A hidden confounder for microbiome studies: medications used years before sample collection https://journals.asm.org/doi/10.1128/msystems.00541-25 Antibiotics and 6 other medications linked to disrupted gut microbiome (microbiota). Antibiotics kill off beneficial bacteria in the gut as well as the bacteria that they are intended to destroy to clear infections https://www.aol.com/antibiotics-6-other-medications-linked-101000835.html