"The cold night guests come to tea like wine, and the bamboo stove soup is boiling." It is very pleasant to make a cup of strong tea on a dry and cold winter night. But after drinking for a long time, you will find that after three rounds of Chunmee tea, two pots of water have been added, and three or four trips to the toilet, they are still very thirsty. Why is this? This is the tea polyphenols and caffeine in tea that are quietly causing trouble.
"Tea polyphenols" is a general term for polyphenols in tea, including flavanols, anthocyanins, flavonoids, flavonols, and phenolic acids. The content of these substances accounts for 18% to 38% of the dry matter of tea. When making tea, tea polyphenols can be quickly dissolved in water and absorbed by the body.
Tea polyphenols can remove harmful free radicals in the human body, and have beneficial effects such as anti-thrombosis and improving immunity. However, after drinking a lot of tea, tea polyphenols can also stimulate gastrointestinal reactions, stimulate renal vasodilation, and increase kidney size. The filtration rate of the ball increases your urine. The water drunk into the body has not been absorbed but has been excreted with the urine. This is the secret of "why tea becomes more thirsty as you drink it".
Similar to tea polyphenols, the diuretic effect of caffeine in tea should not be underestimated. The human brain produces a hormone-ADH (antidiuretic hormone/vasopressin), which increases the reabsorption of water by the kidneys. But in the process of drinking tea, ingesting caffeine from the human body is like "grabbing relatives", taking the lead in snatching ADH away. The kidneys that do not get the antidiuretic hormone cannot strengthen the reabsorption effect, and the amount of urine discharged will increase. Of course, the more you drink this pot of tea, the more thirsty you get.