Orange juice is a good source of potassium, which is essential for the proper functioning of the heart, maintaining water balance, and digestion. It also prevents high blood pressure. In addition, oranges contain an antioxidant called hesperidin, which lowers blood pressure and cholesterol, and decreases the risk of cardiovascular diseases. One glass of orange juice provides a good amount of Vitamin C, potassium, and folate. It provides a set of nutrients that support the health of the brain, heart, bones, skin, and immune system.