The truth is that bananas alone aren’t a threat to your health. Bananas are healthy and nutritious fruit that offers many health benefits. They’re an excellent source of fiber, vitamins and minerals. They can aid in regulating the levels of blood sugar, reduce blood pressure and enhance the health of your heart. But, eating excessive amounts of bananas over the span of a few hours may cause digestive discomfort including gas, bloating and diarrhea. The reason for this is that bananas are rich in natural sugars that can be fermented in the digestive tract and lead to digestive issues.