They can also fight cancer, skin diseases, colds, the flu and a number of other ailments. Oranges contain flavanoids, which are one of the largest groups of dietary antioxidants. Oranges are also a natural source of folic acid and Vitamin B. Studies have shown that most people, especially pregnant women, are not getting enough of these vitamins. A study published last year, by the American Journal of Clinical Nutrition , suggests that women who do not metabolize folic acid properly are at a greater risk of having a child with Downs Syndrome. The U.S. Public Health Service advised women of childbearing age to ensure an adequate intake of folic acid.
Oranges are also a low-fat and easily metabolized source of carbohydrates.
Within the 70 calories of a medium-sized orange, there are16 grams of carbohydrates. During physical activity, the muscles use stored carbohydrates, called glycogen, to fuel daily activity. Oranges are also a good source of fiber, which keeps the intestinal tract healthy and eating some of the spongy-white pith of an orange helps increase fiber intake. Orange juice can improve digestion because it is rich in salts and acts as a stimulant to the digestive system by improving peristaltic activity and the flow of gastric juices in the colon. It is recommended that one should drink a glass of orange juice one hour before breakfast.