Bananas are famous for being very rich in potassium. You will be surprised to know that 40% of that potassium comes from the peel only. This 40% of potassium is all what your body needs to lose all those pounds. Potassium is a great metabolism booster and in that way your body burns more calories. Did we mention that it creates a lot of energy for you so you can build those muscles? When you feel a lot of caged energy you are inclined to let it out and eventually lose weight.