The polyphenolic compounds in black tea have anti-inflammatory effects. Experiments have found that catechins can bind to single-cell bacteria, causing protein coagulation and precipitation, thereby inhibiting and eliminating pathogens. Black tea can improve vascular function, which is actually due to theaflavins' inhibition of angiotensin-I converting enzyme, as well as caffeine and catechins that relax blood vessel walls, causing vasodilation.

The benefits of black tea include: promoting gastrointestinal digestion and enhancing immunity. In addition, people's appetite increases in winter, and they consume more greasy food. Drinking black tea can eliminate greasiness, stimulate appetite, aid in health preservation, promote digestion, act as a diuretic, reduce edema, and strengthen myocardial function. At the same time, black tea has strong antibacterial power. Gargling with black tea can prevent colds caused by filterable viruses, prevent tooth decay and food poisoning, and lower blood sugar and blood pressure. Based on the above, regarding whether drinking black tea causes internal heat? We can already conclude that it does not.

Black tea has a sweet taste and warm nature, is good at accumulating positive energy, generates heat and warms the abdomen, and can enhance the body's resistance to cold. When drinking tea, it is best to enjoy it purely to appreciate the tea's aroma and flavor. However, drinking tea with friends, chatting, and having some snacks is also a form of entertainment and leisure. Another advantage of black tea is its mildness and good compatibility, so it can be mixed with milk, roses, honey, etc.