Tea is a common drink in life. Drinking tea has a long history in China. Moderate drinking has the benefits of refreshing and preventing tooth decay. But if you drink it for a long time or in excess, it may cause gastrointestinal discomfort, insomnia or neurasthenia.

First, the benefits:

1, refreshing: tea contains caffeine and tea polyphenols, which can stimulate the nerve center, refresh the spirit and play a refreshing role;

2, anti-tooth decay: tea contains fluoride ions, which can generate a protective film for teeth, protect teeth and prevent tooth decay;

3, conducive to weight loss: the aromatic compounds in tea can promote the secretion of gastric juice, and have the functions of relieving greasy, helping digestion and dissolving fat;

4. Auxiliary prevention of cardiovascular diseases: Tea contains caffeine and theophylline. Moderate drinking can promote blood circulation, protect blood vessels and play an auxiliary preventive role in cardiovascular diseases.

Second, the shortcomings:

1, gastrointestinal discomfort: Tea leaves into the stomach will promote gastric acid secretion, so people with digestive tract diseases such as gastric ulcer and duodenal ulcer will aggravate the condition. If the tea leaves are left for too long or more than 24 hours, it is easy to produce bacterial reproduction, which will deteriorate the tea leaves and cause gastrointestinal discomfort. Drinking tea or strong tea on an empty stomach will dilute gastric acid and cause gastrointestinal dysfunction;

2, insomnia or neurasthenia: drinking too much tea or drinking strong tea leads to excessive caffeine intake in tea, which is easy to cause insomnia, headache, palpitations, neurasthenia and other adverse symptoms.