Bananas are great medicine! Do buy organic…They are one of nature’s ideal snacks as they are high in potassium which is a vital mineral for muscle and nerve function. Potassium also helps to regulate blood pressure. Bananas are helpful in treating stomach upsets. Diarrhea can be cured by using the BRAT diet: bananas, white rice, apples and white toast. Research is being carried out to see if the starch found in bananas is important, as fibre, to ward off bowel cancer.