Researchers at the University of Hawaii studied the effectiveness of flavenoids in reducing lung cancer risks. They found that the flavenoids do offer protection, but that some work better than others.
Specifically, according to a report in the Journal of the National Cancer Institute, quercetin, which is found in onions, protects against cancer better than naringin, the flavenoid in white grapefruit.
So now the bad news. If you eat onions, along with the other health favorite, garlic, you'll probably want to work from home via an Internet connection. A chat room may be the only room anyone will share with you.