Broccoli, cabbage and kale
The isothiocynanates in these cruciferous vegetables stimulate the liver to break down pesticides and other carcinogens. In people susceptible to colon cancer, these phytochemicals seem to reduce risk.

Carrots, mangos and winter squash
The alpha and beta carotenes in these orange vegetables and fruits play a role in cancer prevention, particularly of the lung, esophagus and stomach.

Citrus fruits, red apples and yams
The large family of compounds known as flavonoids found in these fruits and vegetables (as well as red wine) show promise as cancer fighters.

Pink grapefruit, red bell peppers and tomatoes
The phytochemical lycopene is actually more available after cooking, which makes tomato paste and ketchup the best sources of it. Lycopene shows promise in fighting lung and prostate cancers.

Red grapes, blueberries and strawberries
The anthocyanins that give these fruits their distinctive colors may help ward off heart disease by preventing clot formation. Anthocyanins also appear to inhibit tumor growth.

Spinach, collard greens and avocado
Lutein, which appears to reduce the risk of cardiovascular disease and stroke as well as guard against age-related macular degeneration (which leads to blindness), is also abundant in pumpkins.