The current study found that black tea extract has anti-ulcer effect, and promotes healing of ulcers caused by drugs such as aspirin and alcohol. Tea extract can also regulate the secretion of gastric acid and promote gastric motility. In the mouse experiment, black tea can improve the motility of the gastrointestinal tract, the researchers believe that this may be related to the regulation of hormones and nitric oxide such as prostaglandins in tea. Experiments with guinea pigs have found that black tea extract can promote intestinal peristalsis, and the active ingredient that acts on intestinal motility is likely to be thearubigin. Other studies have found that black tea, green tea, and Pu’er tea all have certain antibacterial effects. Drinking black tea can reduce harmful bacteria in the digestive tract, such as Staphylococcus aureus, and among those who drink more Chinese tea, Helicobacter pylori The infection rate is significantly reduced.

Studies have shown that black tea extract has anti-diarrhea effect in animal experiments and has the effect of regulating intestinal mucosal cell permeability. There are also studies suggesting that tea extract may be helpful for intestinal flora balance. Among the animal models of drug-induced colitis, the safflower extracted from black tea has the effect of preventing diarrhea and reducing structural damage of the colon. Researchers believe that the protective effect of black tea on intestinal inflammation may be due to mechanisms such as regulation of nitric oxide formation, regulation of cytokines, and antioxidant effects.

It can be seen that the statement that black tea is beneficial to the stomach is not a hole in the wind. After the improvement of gastrointestinal function, the digestion and absorption capacity of various nutrients will be enhanced. Even if the polyphenols contained in the tea itself can bind a small amount of protein and iron, the overall effect will still help to improve the nutritional status of the human body. It can be seen that the statement that black tea is beneficial to the stomach is not a hole in the wind. After the improvement of gastrointestinal function, the digestion and absorption capacity of various nutrients will be enhanced. Even if the polyphenols contained in the tea itself can bind a small amount of protein and iron, the overall effect will still help to improve the nutritional status of the human body.