Oranges provide an excellent source of vitamin C and flavonoids. They also offer a good source of fiber, carotenes, pectin, potassium, and B vitamins (including vitamins B1, B2, B6, folic acid, and pantothenic acid).
Due to the combination of high vitamin C content and flavonoids, oranges are important wherever vitamin C is required to function. Oranges are especially beneficial for the immune system, lens of the eye, adrenal glands,connective tissues, the reproductive organs, and in promoting overall good health. Oranges contain a very important flavonoid called hesperidin. Studies have shown that hesperidin lowers cholesterol and high blood pressure. The flavonoid also contains strong anti-inflammatory properties. A high concentration of hesperidin is found in the inner part of the peel and in the white pulp of the orange.
Studies have shown that consuming oranges and orange juice protects against cancer and helps to fight viral infections. The pectin in oranges also contains properties that are similar to that of grapefruit pectin. Pectin is effective in lowering cholesterol levels.
Tangerines, tangelos, citrons, and mandarin oranges, provide similar health benefits as oranges.