Oranges are a vitamin-packed and healthy food, but moderation is key. They have a high concentration of acid, which can be irritating to the stomach, especially if you have gastroesophageal reflux ...

Red and orange vegetables are very high in vitamin A, which is needed for the health of the salivary glands and mucosal tissues of the mouth. A lack of this vitamin can also cause brittle teeth.

Blood oranges are known for their great taste and vitamin C, but that's just the beginning. Here are 7 health benefits, along with a few tips on eating them.

Citrus fruits are famous for their high vitamin C content — and for good reason. One navel orange contains 83 milligrams of vitamin C and one half of a red grapefruit contains about 46.