Black tea has the function of refreshing and relieving fatigue. Black tea can excite the nerve center, promote refreshing and concentration of thinking, thus making the thinking reaction more acute and enhancing the memory. Black tea has an exciting effect on cardiovascular and cerebrovascular diseases and the heart, strengthens the heart beat, thus strengthening blood circulation and metabolism, and at the same time promoting sweating and diuresis.

Black tea has the function of promoting fluid production and clearing away heat, which can stimulate saliva secretion, make the mouth feel moist and produce a cool feeling.

Diuretic action, in black tea, under the combined action of caffeine and aromatic substances, increases the blood flow of the kidney, improves the glomerular filtration rate, dilates the renal microvessels, and inhibits the reabsorption of water by renal tubules, thus promoting the increase of urine volume.

Black tea has anti-inflammatory and bactericidal effects. It also has detoxification effect. It also has the function of strengthening bones.

I hope you can be satisfied with my answer! Good health!