O n March 17, PepsiCo announced that it has entered into an agreement to acquire the prebiotic soda brand Poppi.  Poppi and other prebiotic soda brands, like Olipop , have gained popularity in recent years with flavors like strawberry lemon, orange, grape, and cherry limeade. The companies claim that their sodas are healthy alternatives to regular soft drinks partly because they contain prebiotics, which serve as food for the bacteria in our gut (which are called probiotics). Both prebiotics