Flavonoids are a type of compound found in many different foods. There are several thousand types, which are broken down into six subgroups: chalcones, flavones, flavonols, flavanones, anthocyanins, and isoflavonoids. Flavonoids have antioxidant activity and are becoming very popular because they have many health promoting effects. Some of the activities attributed to flavonoids include: anti-allergic, antioxidant, anti-inflammatory and anti-viral. There are many different sources of flavonoids, including berries, tea, wine, beer, chocolate, many vegetables, and most of all fruits.