Oranges are among the world’s most popular fruits. Also called sweet oranges, they grow on orange trees (Citrus x sinensis) and belong to a large group of fruits known as citrus fruits. Their true origin is a mystery, but the cultivation of oranges is thought to have started in eastern Asia thousands of years ago. Today, they are grown in most warm regions of the world and consumed either fresh or as juice. Oranges are a healthy source of fiber, vitamin C, thiamine, folate, and antioxidants. They have multiple health benefits.