Green banana is the unripe form of the same yellow bananas that we eat as a snack. 1 cup boiled serving of green banana contains 39 percent of the daily value of Vitamin. It is rich in vitamin C, vitamin B6, potassium and the fiber. Their resistant starch helps keep the digestive tract healthy. Also it increases insulin sensitivity, helping people with type 2 diabetes control blood sugars. They are high in potassium which aids blood pressure control.