No, bananas don’t contain probiotics. They do contain prebiotics in small amounts, particularly green, unripe bananas. Prebiotics are indigestible carbohydrates present in some foods; this prebiotic fiber is food for probiotics in your gut. Probiotics and prebiotics work synergistically to keep your gut well-populated and healthy. Other natural food sources of prebiotics include: chicory, chocolate, almonds, garlic, onions, and leeks.