I got this from the below web site and thought it might be of interest to some. I do not see where it has been talked about recently.
http://www.phytochemicals.infoPhytochemicals are non-nutritive plant chemicals that have protective or disease preventive properties. There are more than thousand known phytochemicals. It is well-known that plant produce these chemicals to protect itself but recent research demonstrate that many phytochemicals can protect humans against diseases. Some of the well-known phytochemicals are lycopene in tomatoes, isoflavones in soy and flavanoids in fruits. Phytochemicals are not essential nutrients and are not required by the human body for sustaining life.