The stars of the fall and winter fruit season, citrus fruits contain close to 200 cancer-fighting compounds, cholesterol-lowering fiber, and inflammation-lowering flavonoids.
An Australian review of 48 studies on diet and cancer found that consuming a daily serving of citrus fruit may cut your risk of mouth, throat, and stomach cancer by up to one half. Grapefruits are also high in lycopene, a cancer-fighter usually found in tomatoes, which are out of season when grapefruit is at its peak.
To get the most benefit, eat your fruit whole, not in the form of juices, so you also get all the valuable fiber. Many of the healthy compounds hide in the rinds, too, so use citrus marmalades, which contain bits of the rinds, and use the zests of oranges, tangerines, and lemons in your cooking.