1. diuretic effect of black tea
Under the combined action of caffeine and aromatic substances in black tea, the blood flow of kidney is increased, the glomerular filtration rate is improved, the renal microvessels are expanded, and the reabsorption of water by renal tubules is inhibited, thus contributing to the increase of urine output. This is conducive to eliminating lactic acid, uric acid (related to gout), excessive salt (related to hypertension), harmful substances, etc. in the body, and alleviating edema caused by heart disease or nephritis.
2. Anti-inflammatory and bactericidal effect of black tea
Polyphenols in black tea have anti-inflammatory effect, and experiments show that catechins can combine with single-celled bacteria to coagulate and precipitate protein, thereby inhibiting and eliminating pathogenic bacteria. Therefore, it is quite beneficial for patients with bacterial dysentery and food poisoning to drink black tea, and strong tea is also commonly used by the people to coat wounds, bedsores and Hong Kong feet.
3. Detoxification effect of black tea
According to experiments, the tea polyphenols in black tea can adsorb heavy metals and biological alkaloids, and precipitate and decompose them, which is a boon for modern people whose drinking water and food are polluted by industry.
4. Black tea can refresh and relieve fatigue.
Through medical experiments, it is found that caffeine in black tea stimulates the nerve center by stimulating the cerebral cortex, which promotes refreshing and concentration of thinking, thus making the thinking response more acute and enhancing memory; It also has an exciting effect on the vascular system and the heart, strengthens the heartbeat, thus speeding up 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 other old and waste substances in the body in a two-pronged manner, and achieving the effect of eliminating fatigue.
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