What are some common flavonoids?

There are dozens of different kinds of flavonoids -- in fact, they are divided into six main subclasses that are hard to keep straight without a degree in biochemistry. The subclasses have names like flavonols, flavones, and flavanones. And the subclasses each contain more tongue-twisters like luteolin, quercetin, cyanidin, and apigenin.

Luckily, you don't have to remember all that. Just remember to eat lots of fruits and vegetables, because these health-promoting compounds are found almost exclusively in produce. You'll also find them in a few beverages, such as tea, wine, and beer. And in chocolate, the main ingredient -- cacao beans -- is derived from plants.

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