Oranges consist carbohydrates and water and also contain many vitamins(such as vitamin C, thiamine, folate, and potassium) and minerals. Oranges are a rich source of many plant compounds which are responsible for its many health benefits.It can also protect against anemia by increasing the absorption of iron. Eating whole oranges is healthier than drinking orange juice. Fruit juices tend to be high in sugar.Some people are allergic to oranges and their acidity can increase symptoms of heartburn.