Navel oranges are one of the most common varieties of sweet oranges (Citrus sinensis). They are sweet, usually seedless, and have thick pebbly skins. Both the skin and the flesh of navel oranges are good for you. The numerous health benefits navel oranges offer are linked to their high concentration of antioxidants and other health promoting nutrients including vitamin C (ascorbic acid), hesperidin, limonene, narirutin and beta-cryptoxanthin. The health benefits of navel oranges range from anti-cancer and anti-asthma effects to the ability to support healthy collagen formation. Collagen is what gives skin a smooth, wrinkle-free appearance. All navel orange varieties provide more or less the same benefits (described in the following paragraphs), so pick the one that you think tastes best.