Flavonoids are dietary compounds naturally found in tea, wine, cocoa, fruits and vegetables. They contribute significantly to taste and colour and are considered to help maintain certain normal, healthy body functions.
A diet rich in flavonoids is generally associated with helping to maintain normal, healthy heart function. All teas from the Camellia Sinensis plant, such as black, green, oolong and white (but not herbal) teas naturally contain between 100 to 300 mg of flavonoids per serving.
Note that while tea is a natural source of flavonoids, it is not a substitute for fruits or vegetables which provide a wide range of nutrients such as flavonoids and essential vitamins and minerals. Please consult your doctor regarding a diet/nutritional plan that is right for you.