Bananas have an antacid effect and are said to protect against stomach ulcers. They contain a compound called as protease inhibitor which protects the stomach from unfriendly bacteria which cause stomach or gastrointestinal disturbances.
Read more: Health Benefits of Bananas / Nutritional Facts of Banana http://www.medindia.net/patients/lifestyleandwellness/health-benefits-of-bananas.htm#ixzz3Q1XJYq15