Banana Premium Robusta are also called as Cavendish bananas. They are large in size and are green colored when unripe and turn to yellow when ripe. Along with the ripening process, the starches in the fruit turn into sugars making it more sweeter.Each 100 g of serving of banana robusta provides 89 calories of energy. Bananas are high in fiber, which can help keep you regular. One banana can provide nearly 10 percent of your daily fiber requirement. Vitamin B6 can also help protect against Type 2 diabetes and aid in weight loss, according to Flores. Like most fruits, bananas are not a source of fat or protein, just carbohydrates. When compared with other fruits, like berries, bananas are higher in energy (calories), which gives them a bad reputation of not being “good” for weight loss. Like berries, bananas are higher in energy (calories), which gives them a bad reputation of not being “good” for weight loss.