what are the side effects of drinking to much tea?
['Reduced iron absorption. Tea is a rich source of a class of compounds called tannins. ... ', 'Increased anxiety, stress, and restlessness. Tea leaves naturally contain caffeine. ... ', 'Poor sleep. ... ', 'Nausea. ... ', 'Heartburn. ... ', 'Pregnancy complications. ... ', 'Headaches. ... ', 'Dizziness.']