Round citrus fruit with an orange tick exterior and juicy orange interior. There are a few types of oranges, citrus x sinensis- the sweet orange and citrus x aurantium - the bitter orange. Just at 60 calories, the orange is packed with vitamins, especially vitamin C. It contains atleast 100% of the recommended amount. Oranges are high in plant compounds, resulting in many health benefits like heart health, cronic diseases, anemia and immune heath.