Glyphosate exposure may spark anxiety by reshaping gut microbes

A 16-week study in adult male rats shows daily exposure to the government-safe glyphosate dose (2 mg/kg) alters gut bacteria—reducing Lactobacillus—and elevates anxiety-like behavior, including avoidance of open spaces and novel objects, with increased activity in the bed nucleus of the stria terminalis; findings suggest regulatory safety limits on glyphosate may underestimate neurobehavioral risks.