1. Reduced iron absorption
Tea is a rich source of a class of compounds called tannins. Tannins can bind to iron in certain foods, rendering it unavailable for absorption in your digestive tract
2. Increased anxiety, stress, and restlessness
Tea leaves naturally contain caffeine. Over consuming caffeine from tea, or any other source, may contribute to feelings of anxiety, stress, and restlessness
3. Poor sleep
Because tea naturally contains caffeine, excessive intake may disrupt your sleep cycle.
Certain compounds in tea may cause nausea, especially when consumed in large quantities or on an empty stomach.
The caffeine in tea may cause heartburn or aggravate preexisting acid reflux symptoms.
6. Pregnancy complications
Exposure to high levels of caffeine from beverages like tea during pregnancy may increase your risk of complications, such as miscarriage and low infant birth weight
Intermittent caffeine intake may help relieve certain types of headaches. However, when used chronically, the opposite effect can occur
Although feeling light-headed or dizzy is a less common side effect, it could be due to drinking too much caffeine from tea.
9. Caffeine dependence
Caffeine is a habit-forming stimulant, and regular intake from tea or any other source could lead to dependence.