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). Sweet bananas vary in size and color.
While we are accustomed to thinking of sweet bananas as having yellow skins, they can also feature red, pink, purple and black tones when ripe. Their flavor and texture range with some varieties being sweet while others have starchier characteristics. In the United States, the most familiar varieties are Big Michael, Martinique and Cavendish. 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.
Bananas are a very good source of vitamin B6 and a good source of manganese, vitamin C, potassium, dietary fiber, potassium, biotin, and copper.