The source of One medium ripe banana has around 110 calories, 0 gram of fat, 1 gram of protein, 28 grams of carbohydrate, 15 grams of naturally occurring sugar, 3 grams of fiber, and 450 milligrams of potassium. Bananas are a very good source of protein. Bananas are a rich source of vitamins and minerals. They are an excellent source of vitamin B6 (which helps the body use proteins properly), magnesium, phosphorus, potassium, copper, and folate (vitamin B9). They are also a good source of vitamin C (about 90% of the daily value), manganese, and a moderate source of calcium and iron. No cholesterol is found in bananas. Raw bananas are very nutritious. However, they do contain enzymes that cause gas. This can be reduced by cooking them first. Also, their nutrient content decreases as they get overripe. Therefore, it is important to buy bananas that are not too green or brown. Bananas are a favorite food of many people all over the world. They can be used in salads, desserts, and beverages. They also have a unique creamy texture that is perfect with vanilla ice cream!