Black tea is rich in carotene, vitamin A, calcium, phosphorus, magnesium, potassium, caffeine, isoleucine, leucine, lysine, glutamic acid, alanine and aspartic acid.

Black tea can help digestion, stimulate appetite, induce diuresis, eliminate edema and strengthen heart function. Flavonoids rich in black tea can scavenge free radicals, have anti-acidification effect and reduce the incidence of myocardial infarction. Chinese medicine believes that tea is also divided into cold and heat. Green tea, for example, tastes bitter and cold, and is suitable for drinking in summer to cool off the heat. Black tea and Pu 'er tea are warm and suitable for drinking in winter. As for oolong tea and Tieguanyin, they are more neutral.

Black tea can help regulate blood sugar, but it is still inconclusive. In winter, the stomach is easy to feel uncomfortable. People who feel uncomfortable after eating too many iced fruits and vegetables can slowly drink black sugar ginger slices in black tea while it is warm, which has the effect of nourishing the stomach and will feel more comfortable, but it is not recommended to drink iced black tea.

Caffeine in black tea stimulates the nerve center by stimulating the cerebral cortex, which promotes the refreshing and concentration of thinking, thus making the thinking reaction more acute and enhancing memory; It also has an exciting effect on the vascular system and the heart, strengthens the heartbeat, thus accelerating blood circulation to facilitate metabolism, and at the same time promoting sweating and diuresis, thus accelerating the excretion of lactic acid (a substance that makes muscles feel tired) and old waste materials in the body in a two-pronged manner, and achieving the effect of eliminating fatigue.