Question: what are the side effects of too much tea?
Answer: 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.