Gas Or Constipation
You already know that bananas are hard on the stomach whether they are ripe or not. If they are not ripe, they can cause constipation, and if they are ripe. That means it has too much fiber which can cause gas.
Bananas have good properties and they taste good. But as you can see, they can wreak havoc to your system as well. It is best to stay away or limit it to eating it once in a blue moon.