For example, did you know, a component found in the spice turmeric has been shown to inhibit a key chemical pathway in cancer cells? That pathway is important to a cancer cell's ability to keep dividing.
Polyphenols in green tea, including one called EGCG, reduce growth of new blood vessels in animal studies (a process tumors need to grow), and suppress the growth of several cancer cell lines in the lab.
Garlic, leeks and onions strongly inhibit growth of colon, brain, lung, prostate, and breast cancer cells in the lab.
Omega-3 fats in fish oil reduce inflammation, a culprit in cancer and heart disease.