Many people think that it is necessary to drink something cold to refresh themselves and quench their thirst in hot weather. In fact, drinking iced drinks is not a healthy and scientific thing. Cold drinks can only reduce the temperature, treat the symptoms but not the root cause, and cannot relieve the summer heat.

The hotter the weather, the more you should drink tea.

First of all, the feeling of thirst is the expression of water shortage in human cells, and drinking tea can replenish more water. The chemical components in tea, such as polyphenols, sugars, pectin and amino acids, react with saliva in the oral cavity to keep the oral cavity moist and play a role in quenching thirst and promoting fluid production.

Secondly, the aromatic substances contained in tea soup play an endothermic role in its volatilization; It is reported that tea can also promote the secretion of sweat glands, so that a large amount of water seeps through the pores on the skin and evaporates. The diuretic effect of caffeine, theophylline and theobromine in tea can also take away a lot of heat, which is beneficial to the temperature drop, thus playing the role of clearing away heat and relieving summer heat. The role of these components fundamentally plays an important role in the regulation of human body temperature.

In addition, research shows that lack of water makes people feel thirsty, and sweating reduces sodium, calcium, potassium and vitamins B and C in the body, which will also aggravate thirst. Vitamin C, in particular, can promote the absorption of oxygen by cells, reduce the body's response to heat and increase saliva secretion. Tea is rich in vitamin C, and its potassium content is as high as 1.5%-2.5%, and it is easy to bubble out. It is an ideal drink for heatstroke prevention and cooling, quenching thirst and promoting fluid production.

Drinking tea to relieve summer heat is recorded in many ancient books. For example, in the Tang Dynasty, Lu Yu's "Tea Classic" said that "tea is for use, tastes cold, and is the most suitable to drink. Diligent people, if they are thirsty, bored, have a headache, have dull eyes, have no limbs, and have a hundred knots, talk about four or five small mouths and fight for the morning dew. "

Another example is the Compendium of Materia Medica in the Tang Dynasty, which said, "It is more important to quench thirst and eliminate epidemic diseases." Sun Dawan's Collection of Tea Spectrum said: "It's wonderful for a husband to quench his thirst, turn his bones into his body, and tea is beneficial to tea." From the collation of ancient documents, it is also discussed that tea can quench thirst, quench thirst, promote fluid production and moisten throat, and so on.

In 1983 "Tea, Healthy Drink" published in London, it is said that drinking a cup of tea before noon or in hot weather is cooler, quieter and more energetic than drinking, and the effect is quite lasting.

Indian data show that drinking a glass of ice water can not only cool down, but also dissipate heat from pores. Drinking a cup of hot tea can evaporate the heat from the skin.

Experiments conducted by the British Clinical Research Center have confirmed that hot tea can lower the skin temperature. After drinking hot tea, the skin temperature can be reduced by 1-2 after 9 minutes, and people who participated in the experiment feel very cool. 15 minutes later, it will return to its original temperature.

Therefore, herbal tea is better in quenching thirst and promoting fluid production; For example, from the perspective of cooling off summer heat, drink hot tea again.