Although numerous cultures have enjoyed tea for centuries as a drink and some recognized its medicinal properties, only in the recent past have people begun to realize truly that tea is a powerful weapon against disease. Numerous studies are published year after year that show tea fights many debilitating and deadly diseases. In fact, more than 1,400 medical articles have been written during the past 10 years about the benefits of green tea alone.
Teas contain a number of active compounds, including catechins, quercetin, kaempferol, chlorogenic acid, theanine, theobromine and theophylline. Of greatest interest to scientists are the catechins, which may reduce stroke, heart failure, cancer, and diabetes. Green tea contains approximately 30 percent catechins, and amounts are even higher in white tea. The lowest levels are in black tea.
Tea is a major source of quercetin, which is a potent anti-inflammatory flavonoid. It also guards against cancer and protects the brain.