Orange juice is the greatest source of vitamin C along with thiamin, folate, and potassium that helps in boosting the functions of the immune system, reducing inflammation, lowering hypertension and increasing heart health by lowering LDL and increasing HDL in blood. The limonoids present in oranges also helps in preventing various types of cancer such as lung, skin, breast and colon cancer. While preparing orange juice try to retain as much of the white pith underneath the peel because it is rich in nutrients.