Bananas are among the most important food crops on the planet. They come from a family of plants called Musa that are native to Southeast Asia and grown in many of the warmer areas of the world. Bananas are a healthy source of fiber, potassium, vitamin B6, vitamin C, and various antioxidants and phyto nutrients. Bananas contain a number of vitamins and minerals. VitaminB6: A medium banana gives you about a quarter of the vitamin B6 you should get each day. It helps with metabolism. And it plays an important role in brain development during pregnancy and infancy, as well as immune system health.