Nutritional information The dietary information for a cup of chopped banana (100-gram) are as follows (approximately): 89 calories 75 percent water 1.1-grams protein Carbohydrates: 22.8 g 12.2 grams of sugar 2.6 grams of fiber 0.3 gram of fat Bananas are high in carbohydrates, which appear mostly as starch in unripe bananas and sugars in ripe bananas. The carbohydrate content of bananas varies dramatically as they mature. Starch is the primary component of unripe bananas. Green bananas can contain up to 80% starch by dry weight. bananas also contain antioxidant flavonoids, which have been linked to a substantial reduction in the risk of heart disease. Unripe, green bananas are high in resistant starch and pectin, both of which are forms of dietary fiber. Prebiotic substances such as resistant starch and pectins promote the development of healthy gut flora. These fibers are digested in your stomach by good bacteria, which produces butyrate, a short-chain fatty acid that improves gut health. Storage Information Store in a clean and dry place. ensure a cool temperature. store in plastic cover with small holes for keeping freshness for longer periods.