Learn how much protein , calories, and other nutrients are in a banana , and how to incorporate bananas into your diet. Discover the health benefits of bananas for blood sugar, digestion, memory, mood, and more. Calories, fat, protein , and carbohydrate values for for Banana and other related foods. One medium banana (about seven inches long) provides about 110 calories, 0 grams fat, 1 gram protein , 28 grams carbohydrates, 15 grams sugar (naturally occurring), 3 grams fiber, and 450 mg potassium. An average-sized banana contains about 100 calories and 25 grams medium (7″ to 7-7/8″ long) (118g grams).
