1. refresh your mind. Caffeine in black tea can stimulate the central nervous system, improve alertness and attention, and make people feel energetic.
2. lower cholesterol. Tea polyphenols in black tea can reduce blood lipid and cholesterol.
3. Prevent tooth decay. Tea polyphenols in black tea can remove bacteria from oral cavity and prevent oral diseases.
4. Prevention and treatment of obesity. Catechins in black tea can promote fat decomposition and prevent the occurrence and development of obesity.
5. Help digestion. Tea polyphenols in black tea can promote gastric juice secretion and help digestion.
The side effects of black tea mainly include the following points:
1. Too much caffeine can cause symptoms such as overexcitation and nervousness.
2. Too much tea polyphenols will stimulate the stomach, leading to diarrhea, bloating and other symptoms.
3. Drinking a lot of black tea for a long time will affect the absorption of iron and easily lead to anemia and other diseases.
4. Black tea contains purine, which can easily lead to gout and other diseases if it is drunk in large quantities for a long time.
Therefore, moderate drinking of black tea is good for your health, but you should also pay attention to reasonable drinking to avoid excessive or long-term excessive drinking. For people with special circumstances, such as cardiovascular diseases, stomach diseases, anemia and other patients, it is necessary to drink black tea under the guidance of a doctor.