Green bananas are also high in vitamin B-6, with a 1-cup boiled serving containing 39 percent of your daily value. Vitamin B-6 plays an important role in more than 100 enzymatic reactions in your body. It is also necessary for the formation of hemoglobin, the protein that carries oxygen in your body. Additionally, vitamin B-6 aids in blood sugar control.
In addition to the resistant starch, green bananas are also a good source of fiber. A 1-cup serving of boiled green bananas contains 3.6 grams of fiber, meeting 14 percent of your daily value.