"It contains the same healthy compunds as broccoli. Flavonoids are natural plant compounds that have potential health benefits, and foods like grapes, berries, and broccoli all contain them. Tea is an especially rich source. According to a USDA database, 1 cup of black tea has 170 milligrams of flavonoids, while 1 cup of broccoli has about 3 milligrams."

Source: https://blogs.webmd.com/diet-nutrition