Caffeine, which is found in tea, can cause gastrointestinal troubles, anxiety, insomnia, and an elevated heart rate when taken in excess. It's critical to keep an eye on how much caffeine you consume, particularly if you are sensitive to it
Caffeine-related Issues
Overindulging in strong teas, especially while the stomach is empty, can cause indigestion, acid reflux, or discomfort in the stomach
Stomach Discomfort
The tannins found in tea, particularly black tea, have the ability to prevent the body from absorbing non-heme iron—the kind of iron included in plant-based diets. If you drink too much tea with your meals, you may become iron deficient, especially if you don't get enough iron from your diet
Iron Absorption
Over time, tea—especially black tea—can discolor teeth. Teeth whitening treatments and routine dental care can help lessen this problem
Stained Teeth
Because tea contains substances known as oxalates, consuming too much of it may be linked to a minor decrease in bone density. This effect is more pronounced in those who consume less calcium
Bone Health
For certain persons, kidney stones might develop as a result of high oxalates in tea. Those who have a history of kidney stones might want to cut back on their tea consumption
Kidney Stones
Certain drugs and tea may interact. Compounds in green tea, for instance, may have an impact on blood coagulation and interact with anticoagulant drugs. It's critical to speak with a healthcare provider about any possible drug interactions if you use prescription medication