Bananas are good for your heart they are packed with potassium, a mineral electrolyte that keeps electricity flowing throughout your body, which is required to keep your heart beating bananas are high in fiber, high in potassium and low in sodium protect cardiovascular system against high blood pressurewhereas oats are among the healthiest grains on earth they're a gluten-free whole grain and a great source of important vitamins, minerals, fiber and antioxidants.