Tea plant accumulates nutritions such as aluminium, manganese and fluoride from soil and water. These minerals can be harmful when consumed in large amounts over many years.
A 2005 study conducted by Dr. Michael Whyte from Washington University raised concerns about the high fluoride content in instant iced tea.
A middle aged woman diagnosed with skeletal fluorosis drank 17 to 33 cups a day, double-strength, because of the hot weather.
This is unusual, but highlight the dangers of drinking too much green tea.
Are you ready to unveil the mysteries of tea caffeine?