Green bananas are high in resistant starch, a type of carbohydrate that acts like fiber. Resistant starch passes through the digestive tract without being fully absorbed, which helps improve gut health, promotes satiety, and stabilizes blood sugar levels. The resistant starch in green bananas acts as a prebiotic, feeding the beneficial bacteria in the gut and promoting a healthy digestive system. This can help prevent constipation, reduce bloating, and improve overall gut health.