The disadvantages of drinking strong tea

Although drinking strong tea can help refresh, but strong tea contains a lot of theophylline, and theophylline has the effect of exciting the central nervous system, long-term application may lead to hyperactivity symptoms, such as palpitation, dizziness, trance, etc., may also seriously affect sleep. At the same time, strong tea fluoride content is relatively high, long-term application may also occur caries phenomenon, tooth surface will also appear a layer of glaze black material. In addition, strong tea also contains caffeine, which inhibits the absorption of calcium in the duodenum and accelerates the excretion of calcium in urine. Long-term drinking may also cause osteoporosis.