Speaking about the benefits of tea, some precautions should be recalled. Firstly, certain categories of people should reduce their tea intake or eliminate it altogether from their diet. These include primarily pregnant women. The caffeine contained in tea stimulates the fetus and negatively affects its development. According to Japanese researchers, in five cups of strong tea drunk per day, there is such an amount of caffeine that can lead to underweight in an infant.
Suffering atherosclerosis and hypertension should not drink strong tea, and during the period of exacerbation, you can and should refuse tea in general, especially black tea. This is due to the stimulating effect of caffeine and theophylline in tea on the central nervous system.
If you are prone to insomnia, you should not drink tea after 18 hours due to the stimulating effect of caffeine and aromatic substances.
Tea is not only not good for patients with high temperature, but also harmful. The heat is accompanied by the expansion of the superficial blood vessels and increased sweating, so high temperature leads to excessive consumption of water, dielectrics and nutrients, which causes thirst. It is generally accepted that strong hot tea quenches thirst well and is therefore useful at elevated temperatures. But this is far from reality. Recently, British pharmacologists have found that strong tea not only does not benefit the sufferers, but, on the contrary, theophylline contained in tea raises body temperature.
There are several prohibitions on the use of tea:
Do not drink tea on an empty stomach. In China, they advise "do not drink tea on an empty heart", because when you drink tea, the cold nature of tea, penetrating inside, can cool the spleen and stomach, which is similar to "penetration of the wolf into the house."
Do not drink too hot burning tea. Due to the strong stimulation of the throat, esophagus and stomach, painful changes in these organs may occur.
Do not drink iced tea. While warm and hot tea give vitality, clear consciousness and eyesight, iced tea gives side effects: cold stagnation and sputum tightening.
Do not abuse strong tea, especially at night. Strong tea high in caffeine and thein can cause insomnia and headache.
Do not drink medicine with tea. Chinese wisdom says that tea destroys medicine.
You should not drink tea either immediately after eating, or, especially, before eating. Between tea and food you need a break of 20-30 minutes.