Bananas contain three natural sugars - sucrose, fructose and glucose - combined with fiber. Banana is an effective fruit for health benefits. Banana is high in Vitamin A which is important for development of tissue in eyes and growth of the skin. The banana plant grows 10 to 26 feet in height and belongs to the family Musaceae. Bananas abound in hundreds of edible varieties that fall under two distinct species: the sweet banana (Musa sapienta, Musa nana) and the plantain banana (Musa paradisiacal). Plantain bananas are usually cooked and considered more like a vegetable due to their starchier qualities; they have a higher beta-carotene concentration than most sweet bananas.