Bananas are considered to be good for the treatment of gastric ulcer and diarrhoea. Because they contain vitamin A, bananas and plantains act as an aid to digestion. Due to their high content of B6 vitamin, they help to reduce stress and anxiety. They are also considered benefitial for cancer prevention and heart diseases. The high content of carbohydrates makes of them a very good source of energy, for example, for people practising sports. Potassium helps to better brain fonctioning.