Some biological properties of plant flavonoids.

The flavonoids are a large group of naturally occurring low molecular weight substances found in fruits, vegetables, nuts, seeds, flowers, and roots as well as wine and teas. They are consumed in the Western diet to the extent of about 1 gram per day. Flavonoids affect many mammalian cellular functions and enzyme systems. Their role in health and disease as natural biologic response modifiers remains to be determined.