Mangoes range greatly in size. They have leathery, smooth skin, and they can vary in shape from long and slender, to kidney-shaped, or even somewhat round. Their skin is multi-colored with different blends of red, yellow and green, depending on the kind. The succulent, vibrant yellow to orange flesh is aromatic and juicy. The flavor is complex and sweet, and is sometimes balanced with a slight tartness. The skin of Mangoes is inedible, and actually contains a sap that can be irritating to some people. In the middle, it contains a large inedible seed. Mangoes are a good source of fiber, Vitamin A, Vitamin C, and potassium. They also contain natural enzymes that assist in breaking down proteins.