Tea ( Chinese “cha” in Peking and Guangdong dialects, “those” in Amoy and “ttsai-e” in Taiwanese ) is a beverage obtained by cooking, brewing and / or infusing a leaf of a tea bush, which is previously prepared in a special way. Tea is also called the leaf of the tea plant itself, processed and prepared to make a drink. This preparation includes pre-drying ( drying ), twisting, more or less long-lasting enzymatic oxidation, final drying. Other operations are introduced into the process only for the production of certain types and varieties of tea. Sometimes the word "tea" is also used as the name of a tea bush - a species of the Camellia genus of the Tea family; In botanical scientific literature, the name Camellia ( Camellia sinensis ) is commonly used for this species. Tea in a broad sense can be called any drink prepared by brewing previously prepared plant material. The names of such drinks to the word "tea", as a rule, add an explanation characterizing the raw materials used ( "herbal tea", "berry tea", "fruit tea" and so on ).
Tea today is one of the most famous and favorite drinks. And, perhaps, there is not a single person who has completely excluded tea from his menu. But the questions arising from the use of tea, quite a lot. For example: how much daily tea is safe for health? Is green tea fashionable useful to everyone today? Is it true that tea is the best quencher for thirst in hot weather. Let's figure it out!
- Original name:
- Country of Origin: PRC
- Author: unknown
- Year of creation: III thousand years BC. e.
- Analogs: Coffee
- Calories: 5 calories (black tea), 1 calorie (green tea), 21 calories (black tea with sugar)
All about tea
Tea is a drink from the leaves of the tea bush. In China, the unusual properties of these leaves opened long ago. And since then, inventing new ways of processing, cooking and drinking tea. And each people in China took what they liked, and adapted it to their own food and traditions. According to experts, tea leaves contain about three hundred ingredients, including proteins, fats, more than 10 types of vitamins, as well as tea phenol, theine and lipid sugars. Therefore, tea nourishes the body, regulates physiological processes and has a general health effect. There is not much caffeine in tea, but it is quite enough to encourage a person and give him strength. In addition, tea is simple to prepare, economical and hygienic.
It turns out that you can drink tea to everyone and in any quantities? Experts answer this question as follows: tea, subject to certain rules for its use, is useful to almost everyone. This is the key phrase. Notice: firstly, while respecting the rules of use, and, secondly, almost everyone, but not all!
First you need to understand the existing types of tea. There are more than 350 types of tea bushes in the world, and the number of tea varieties currently being produced is over a thousand. By the way of processing all teas are divided into the following main categories: Fermented tea, or red.
- Semi-fermented tea, or black. These two types of tea: red and black - the most common among us, we usually do not distinguish them and call \ "black tea \".
- Non-fermented tea: green and white. \ "Green \" has recently become widespread in our country, but \ "white \" familiar to few.
Tea with additives of natural fragrant flowers, or the so-called \ "flower tea \". Note: in this case we are talking exclusively about natural additives!
Why did we give this classification here? The fact is that the choice of teas should be approached individually. Teas of different varieties vary greatly in composition and, as a result, effects on the body.
Children can drink all sorts of tea, however, subject to a number of rules: do not give them more than 2-3 small cups a day, do not brew tea hard and do not drink it in the evening. In addition, the tea should be warm, not hot or cold.
In adolescence, green tea is especially useful. Red and black drink is also possible, but do not brew them tightly. For teens with an unstable psyche, floral tea is very helpful. It cleans the liver and removes toxins, normalizes many age-related physiological processes. In general, experts recommend that children and adolescents drink lightly brewed tea and rinse tea with their mouths.
In young and mature all teas are very useful. Women, for example, are especially recommended fermented red tea, and those who want to lose weight - black, semi-fermented. For people with gastric diseases, tea with mint is well suited, and those suffering from liver diseases - a flowery tea. As for green tea, the content of vitamin C and tea phenol is much higher than in other types, therefore this tea has a much more pronounced antibacterial, anti-radiation and anti-sclerotic effect, it effectively reduces the sugar content in the blood and improves the blood. In addition, almost all flower teas are made on the basis of green, and have the same properties.
Elderly people, especially those suffering from constipation, strong green tea can be harmful, as it has a fixing effect. But red tea strengthens the stomach and is a good diuretic. Therefore, red tea is indispensable in old age.
What is useful tea
And really, what is useful tea, because it, like coffee, contains caffeine. It turns out that tea caffeine acts on the body for a longer time. At the same time, tea caffeine has a stimulating effect on the cardiovascular system, kidneys, and digestive tract.
Black tea has P-vitamin activity, and, in addition, increases the absorption of vitamin C. Black tea is also useful because it strengthens the walls of blood vessels and saturates the body with antioxidants - substances that protect cells from germs, aging and exposure to harmful environmental factors.
Due to its property to destroy pathogenic bacteria, black tea eliminates bad breath. Therefore, smokers after a smoke break is recommended to rinse your mouth with cold tea.
Many experts believe that tea has a warning effect against stroke - this is due to the fact that under the influence of tea, the cerebral circulation increases, more oxygen enters the brain.
In addition, tea inhibits the formation of fat deposits on the inner surface of blood vessels, and therefore reduces the risk of developing sclerosis, hypertension and cerebral clots.
The effects that black tea possesses fully apply to green tea. Only in green tea, they are even more pronounced.
Green tea contains epigallocatechin galatte - a substance that is 100 times stronger than vitamin C and 25 times more than vitamin E protects the body's cells from the harmful effects that provoke cancer or cause cardiovascular diseases.
Green tea has anti-aging properties and is effective for hangover syndrome: it is worth to drink a few cups of green tea, and the hangover is quick and painless.
The main thing is to make tea properly
In order to get all the benefits from the drink, you need to know how to brew tea. For example, green tea can be brewed repeatedly, but preferably not more than five times. But black tea - no more than once. Moreover, it should be drunk within fifteen minutes after brewing. In black tea, the process of spontaneous oxidation of aromatic constituents, phenol, lipids, and essential oils most intensively occurs.
The way, when a concentrated infusion of tea is first made, which is then diluted with boiling water as needed, can harm the body. In addition to oxidation, a film is formed on the surface of tea that is dangerous for the human digestive system. Therefore, tea should be drunk immediately after it is brewed.
Tea use rules
We now turn to the rules of drinking tea. In fact, they are quite a lot, but they are all very simple and reasonable. So:
- Do not drink tea on an empty stomach, just before or immediately after a meal. It is best to drink it in 20-30 minutes after eating.
- It is harmful to drink both scalding and cold tea: the optimum temperature of tea is 50-60 ° C.
- It is harmful to use strong tea often: high levels of caffeine and theine can cause headaches and insomnia.
- You can not brew tea for a long time. This greatly reduces the nutritional value of the drink.
- It is better not to practice repeated brewing of tea. Usually, after the third or fourth tea leaves, there is already little left, and harmful constituents begin to leave in the infusion.
- Do not drink tea medications. The Chinese say that tea destroys medicines.
- Do not drink yesterday's tea: it not only loses vitamins, but also becomes an ideal breeding ground for bacteria.
As for the amount of tea consumed per day, experts recommend drinking no more than 4-5 cups of weak tea during the day. The exception, as we have said, is only children, the upper limit for which is 2-3 cups. If you prefer strong tea, then limit to 2-3 cups. In general, all calculations are made by specialists, based on the fact that there are 3 grams of tea leaves per cup. That is, a day should not consume more than 5-10 grams of tea.
Tea can be harmful
In addition to caffeine, tea contains theophylline - a substance that has a diuretic effect and stimulates the central nervous system. In addition, research has shown that theophylline can inhibit phosphoric acid compound, which leads to increased production of gastric acid. The decisive factor is the strength of the tea and the number of its tea leaves. The higher the strength, the more caffeine, theophylline and other substances in tea.
Another significant minus of strong tea is that it neutralizes and removes magnesium from the body. Meanwhile, magnesium is responsible for the state of our nervous system. With its deficiency, there is a so-called chronic fatigue syndrome with its typical general weakness and confusion in thoughts. In addition, magnesium deficiency leads to meteorological dependence, nightmares, muscle tension and spasms. Therefore, tea lovers should definitely include in the diet foods rich in magnesium salts - apricots, peaches, cauliflower, nuts, bran, legumes.
Tea can be harmful due to the fact that it may contain flavors and dyes. In addition, hot tea burns internal organs, and as a result painful changes of these organs can begin.
The zealous tea lovers may have problems with their teeth. Because of black tea, for example, the teeth turn yellow. And from green tea, if you drink more than 5 cups a day, the enamel on the teeth is destroyed.
You should also know that green tea has a fixing property, and therefore it should not be drunk for people suffering from constipation. Green tea and hypotensive are contraindicated, as it lowers blood pressure.
It is not recommended to drink tea at a high temperature, because tea, especially strong, already increases the body temperature. And in no case should you drink tea with medications, including multivitamins. With such a compound, sediment often appears, and as a result, drugs are not absorbed by the body.
Categories of people whom experts recommend drinking less tea
First, pregnant women. After all, tea contains a certain amount of caffeine, which, stimulating the fruit, negatively affects its development. In addition, caffeine causes increased heart rate and increases urination, which increases the load on the heart and kidneys, and thus increases the likelihood of developing toxicosis
Secondly, the ulcers. Although tea and helps digestion, but suffering from gastric ulcer and duodenal ulcer, as well as increased acidity in the stomach should be moderated. The ulcers are recommended to limit the consumption of tea, excluding strong in general. They are best to drink tea with milk and sugar.
Thirdly, people suffering from atherosclerosis and hypertension in severe form. Patients with a similar diagnosis should drink tea with caution, and during periods of exacerbation, they should stop using red and strong brewed tea at all.
Fourth, people who suffer from insomnia. Although insomnia can have a variety of reasons, you should not drink tea shortly before bedtime - due to the stimulating effect of caffeine and aromatic substances. A cup of tea, especially strong, before going to bed brings a person into a state of excitement, and it becomes almost impossible to fall asleep.
Fifth, patients with high fever. It is considered that strong hot tea quenches thirst well and is therefore useful at elevated temperatures. But it is not. Scientists have found that theophylline contained in tea increases body temperature. Theophylline also has a diuretic effect, and therefore it makes any antipyretic drugs ineffective or ineffective.
Note that the use of tea, like any other drink, is an individual process for everyone. For me personally - for example, I tolerate as well as green and black tea, strongly or poorly brewed. Follow all the above rules and restrictions - unless, of course, you take care of yourself and your health!