Red bananas should have a deep red or maroon rind when ripe, and are best eaten when unbruised and slightly soft. This variety contains more beta carotene and vitamin C than yellow banana. It also contains potassium and iron. The redder the fruit, the more carotene and the higher the vitamin C level.[2] As with yellow bananas, red bananas will ripen in a few days at room temperature and are best stored outside refrigeration.