Navelina oranges are a variety of sweet oranges native to Spain, known for their easy peeling and abundant juice. Oranges are mostly made up of water (90%) and sugars (5%), making them refreshing and nutritious. They are ideal for preventing colds due to their high vitamin C content, a powerful antioxidant that also helps burn fat and prevent arteriosclerosis. Several varieties exist, like the Navel orange, a result of a 19th-century mutation in Brazil. Oranges are perfect for breakfast, especially highlighting fresh orange juice in the morning for its health benefits. Store oranges in the fridge to extend their freshness for three weeks or at room temperature for more juice.