Black tea is a kind of fully fermented tea, which is characterized by red soup after brewing, sweet and moist taste, rich in protein, and has the functions of refreshing and relieving fatigue. In winter, the north wind blows hard and the cold attacks people, and the human body is vulnerable to the invasion of yang. At this time, it is best to choose sweet and moist black tea to moisten the yang of the human body, especially women. Black tea, red leaves and red soup give people a warm feeling;

It is freezing in winter, everything is dormant, cold evil attacks people, the physiological function of human body declines, and the yang gradually declines. Chinese medicine believes: "In the cold winter, everything is alive and hidden, and the physiological activities of the human body are in a state of inhibition. The way to keep healthy is to keep out the cold, so black tea is the top grade in winter. Black tea is made by fermentation and baking. During the fermentation process, tea leaves turn into red oxides and become black tea under the action of oxidase. Black tea is mild in nature and mellow in taste. Besides containing a variety of water-soluble vitamins, it is also rich in trace element potassium. When brewing, 70% potassium can be dissolved in tea. Potassium can enhance blood circulation in the heart and reduce calcium consumption in the body. Because manganese contained in black tea is one of the indispensable elements of bone structure, drinking black tea often is also beneficial to bone strength. According to foreign reports, drinking black tea often has the effect of preventing and treating influenza, stroke and skin cancer.

Studies have shown that black tea contains flavonoids, which are similar to antioxidants and can prevent stroke and heart disease. A recent study in the United States shows that people who drink a cup of black tea every day have a lower risk of heart disease than those who don't drink tea.

Drinking black tea for a long time can also reduce the occurrence of cardiovascular diseases.

Drinking black tea for a long time will make you feel weak and cold, your stomach is no longer as strong and diarrhea as before ... what's more, sometimes your kidneys will feel cold and painful. Fully fermented tea, such as Pu 'er tea and black tea. The more complete the fermented grains are, the more harmful compounds (such as vitamin C) in tea will be destroyed. On the contrary, it brings negative effects, such as palpitation and slow absorption of calcium by the body.