Garlic

Garlic may strengthen the immune system, helping the body fight diseases such as cancer. In test tubes, garlic seems to have anti-cancer activity. And population studies -- ones that follow groups of people over time -- suggest that people who eat more raw or cooked garlic are less likely to develop certain types of cancer, particularly colon and stomach cancers. In fact, researchers who reviewed 7 studies found a 30% reduction in risk of colorectal cancer among people who ate a lot of raw or cooked garlic. Garlic supplements don' t seem to have the same effect.