Isoflavones - are found in soybeans and other legumes. An example is genistein.
Indoles - are also found in cruciferous vegetables. An example is indole carbinol.
Allyl sulfides - are found in plants of the garlic and onion family.
Polyphenols - such as epigallocatechin gallate are commonly found in green teas.
Carotenoids - a large class of compounds that include pigments and the familiar β-carotene, the precursor to Vitamin A. Of particular interest is lycopene, found in tomatoes, which holds promise in the prevention of prostate cancer.
Phenols - provide protection from oxidative damage and inflammation. An example is resveratrol found in grapes.
Other examples - include curcumin in the spice turmeric, capsaicin found in chili peppers, and gingerol in the spice ginger.
Further Reading
1. American Institute for Cancer Research. Dietary Phytochemicals May Play Major Role in Cancer Prevention. Annual Research Conference
2. Begley, S. Beyond Vitamins. Newsweek, April 25, 1994, pages 45-49
3. Surh, Y. Cancer Chemoprevention with Dietary Phytochemicals. Nature Reviews Cancer, Vol. 3, No. 10 ( October 2003)
4. Zimmerman, M. Phytochemicals: Nutrients of the Future. Realtime.net
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