Pu-erh tea can be drunk in moderation for a long time, but not in large quantities for a long time. Pu-erh tea contains tea polyphenols, ellagic acid, caffeine and other ingredients, long-term large amounts of drinking may lead to constipation, insomnia and so on. 1. lead to constipation: Pu-erh tea contains tannic acid and other ingredients, these ingredients have a strong astringent, long-term drink will lead to slow gastrointestinal peristalsis, thus affecting the digestion and absorption of food. Therefore, drinking large quantities of Pu-erh tea for a long time may lead to constipation. 2. cause insomnia: Pu-erh tea contains a lot of caffeine and other ingredients, these substances have an excitatory effect on the cerebral cortex, long-term drinking a large amount of Pu-erh tea will lead to the brain in a state of extreme excitement, resulting in insomnia. It is recommended to drink Pu-erh tea in moderation to avoid damaging your health.