According to analysis, tea contains 2%~5% caffeine, and the caffeine content in strong tea is higher. A cup of strong tea contains about 100 mg of caffeine. Excessive caffeine can lead to nervous overexcitation and insomnia. At the same time, it can also cause tachycardia, which is not good for patients with coronary heart disease who suffer from tachycardia, premature beats and atrial fibrillation.

Tea is indeed a healthy drink, but it is better to have no more than two cups in an ordinary cup every day. After all, the human body has a great demand for water. Drinking tea when you are thirsty will make your teeth yellow, and drinking tea is good for urination. Drinking too much will often run to the toilet, which is not good for the urinary system.

/ik now-pic . cdn . BCE Bos . com/b 3 b 7d 0 a 20 cf 43 1ad 7 15 DDD 8 b 4636 acaf 2 FDD 98 f 1 " target = " _ blank " title = " " class = " ikqb _ img _ alink " >/iknow-pic . cdn . BCE Bos . com/b 3b 7d 0 a 20 cf 43 1ad 7 15 DDD 8b 4636 acaf 2 FDD 98 f 1？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 600% 2Ch _ 800% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto " esrc = "/ n/20 14/ 12 10/c 354973-23 178449 . html " target = " _ "

References:

/sd.people.com.cn/N2/2017/128/c172848-30970736.html "target =" _ blank "title =" People's Network. People's Network-What should I do if I only drink tea after a long thirst?

References:

/shipping.people.com.cn/n/2015/0215/c85914-26569107.html "target =" _ blank "title =" people. People's Network-Drink less tea for 5 hours. Eight kinds of people had better not drink tea.