Two healthy beverages having a moment right now are the fizzy delights kombucha and prebiotic soda, both of which promise to improve your gut health. But if it’s prebiotic soda vs. kombucha, head to head, is one better for your microbiome than the other? Potential downsides of prebiotic sodaThere are two possible drawbacks of prebiotic soda to keep in mind when choosing one. Kombucha benefitsWhile prebiotic soda contains fibers that feed the bacteria already living in your gut, kombucha effectively adds to the population. Prebiotic soda vs. kombucha: Which is best for gut health?