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 phytonutrients.Bananas contain a number of vitamins and minerals. Vitamin B6: 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.Bananas contain fiber, potassium, folate, and antioxidants, such as vitamin C. All of these support heart health. A 2017 review found that people who follow a high fiber diet have a lower risk of cardiovascular disease than those on a low fiber diet.Bananas are packed with vitamins and nutrients and when you eat a banana on a regular basis, they help to maintain and improve your overall health. In other words, eating a banana a day is definitely the way to go to stay healthy. However, it's important to remember not to go overboard with your daily banana intake.Rich in potassium and magnesium, bananas give the brain energy and help sharpen the brain's focus, increasing the ability to pay attention and learn. Bananas also offer vitamins and nutrients that improve cognitive function overall.Bananas are one of the best fruit sources of vitamin B6. It helps the body to produce red blood cells, metabolize carbohydrates and fats, metabolize amino acids, remove unwanted chemicals from your liver and kidneys, and maintain a healthy nervous system.One large banana has about 120 calories and 17 grams of sugars — that's more than double what you'd get in 1 cup of strawberry slices, which has 53 calories and about 8 grams of sugars.