Ans. The chemical group known as tannins is abundant in tea. Moreover, tannins in some foods can make it difficult for your digestive system to absorb iron. Anxiety, stress, and restlessness may result from consuming too much tea. Besides, tea contains substances that can make you sick, especially if you drink a lot of it or when you're hungry. Consuming tea may also worsen the existing acid reflux symptoms or even cause heartburn.