Drinking tea in moderation is generally considered safe and may have some health benefits, such as reducing the risk of certain diseases and promoting hydration. However, excessive consumption of tea can be harmful to health. Consuming more than 4 cups per day of tea can cause side effects such as insomnia, nervousness, stomach upset, and an increased heart rate. It also contains caffeine that can cause jitteriness, anxiety and increase in blood pressure. Tea can also interact with certain medications, so it's important to talk to your doctor or pharmacist if you are taking any prescriptions. It's also worth noting that some types of tea, such as green tea, contain high levels of a naturally occurring compound called fluoride. This can be beneficial for dental health, but too much fluoride can cause a condition called fluorosis, which can discolor and weaken the teeth. Also, some herbal teas can be harmful if consumed in excessive amounts or by certain groups of people. Pregnant women and breastfeeding mothers should be especially careful when consuming herbal teas, as some of the herbs used in these teas may not be safe for them. Overall, it's important to consume tea in moderation and to be mindful of any potential risks or interactions with medications. Consult a doctor or a dietician for specific advice on diet, especially if you have any health concerns.