What are the side effects of green tea. Normalization of the digestive system

The issue of the impact of this drink on the human body is very acute for the modern consumer. However, in his homeland, doubts about the benefits of pu-erh tea disappeared many centuries ago. No wonder pu-erh for a long time used exclusively in medicinal purposes, and only then began to use it on a daily basis. And among the people, the Chinese even call it a remedy for a hundred diseases. So, let's finally move on to describing the properties of pu-erh.

Benefits of pu-erh tea

feature this tea is that it begins to acquire its useful properties only a few months after manufacture. Moreover, the older the pu-erh, the higher its healing qualities. Puer tea, the benefits and harms of which are periodically discussed in scientific circles, also has properties that are not in doubt.

weight loss

Pu-erh tea contains tannins. These plant phenolic compounds have a beneficial effect on the metabolism in the body. Thanks to them, nutrients are absorbed by the body in smaller quantities. Therefore, leading nutritionists include pu-erh in the diet of many diets.

Table nutritional value pu-erh tea (per 100 grams)

Many weight loss products, being quite effective, make you pay for harmony with damaged nails, hair, and skin. Unlike them Puer tea on the contrary, it helps to make the skin more elastic and supple, nails strong, hair shiny.

Digestive system

Another constituent element of pu-erh is the polysaccharide Pectin. Its effect is mainly in the gentle cleansing of the intestines and the removal of toxins from it. Regular consumption of the drink normalizes the functioning of the liver, spleen, gallbladder.

It can be used to restore the body after food poisoning or alcohol or drug intoxication. Moreover, even people suffering from an ulcer can drink pu-erh tea, since it does not increase the acidity of gastric juice.

Pressure

In this regard, the benefits of pu-erh tea will come in handy for those who are concerned about low blood pressure. Hypotonic patients are often recommended all kinds of energy drinks, for example, coffee. The effect of pu-erh is no worse, and side effects are excluded.

But it is better for hypertensive patients to refrain from drinking this drink. But we will talk about this a little lower in the chapter on its possible harm.

Circulatory system

According to research regular use Puerh can lower blood cholesterol levels by 60-65% within a few months.

Suffering diabetes Type 2 is recommended to consult with your endocrinologist about the inclusion of this drink in the diet. Pu-erh tea lowers blood sugar levels, which means it will allow you to quickly stop using medications.

Nervous system

Pu-erh tea is incredibly beneficial when used correctly.

Surprisingly, pu-erh tea affects the human nervous system. It can affect her in different ways depending on your current state. For this, the method of making tea matters. If you are too excited or irritated, you should boil pu-erh. Then it will have a calming effect. If you experience a breakdown, drowsiness, then pu-erh should be brewed. In this case, it will act as an effective tonic.

In conclusion, I would like to add a few more notes about the benefits of pu-erh tea.

• The older the tea, the more pectin it contains.
• Pu-erh is great for hangovers.
• The best time to drink this drink is early in the morning or at noon.
• Regular intake of this tea improves metabolism

Well, now let's move on to possible contraindications this drink.

Harm of pu-erh tea

As we mentioned above, pu-erh is not recommended for people suffering from chronic high blood pressure. In this case, the excellent tonic properties of the drink can be harmful and lead to a deterioration in the condition. The same applies to children under the age of three, as well as pregnant women.

Another contraindication is urolithiasis of the kidneys. Drinking pu-erh can cause stones to move and cause bouts of pain.

Perhaps on this list harmful effects pu-erh tea on the body ends. But it does not hurt to mention that sometimes it can have a certain heady effect.

Pu-erh tea is not harmful and has no narcotic effect.

No, of course, there is nothing in common between this drink and drugs. The maximum that can be achieved is a slight dope and noise in the head. Many types of teas can cause this “tea intoxication” if they are intentionally brewed extremely strong. Therefore, talk about "narcotic substances found by scientists in pu-erh" is nothing more than rumors.

If, due to inexperience, you brewed tea incorrectly and accidentally got this effect, do not worry. It can be easily eliminated by eating a piece of chocolate or a piece of some fruit. Well, if you want to completely eliminate the appearance of " tea intoxication”, read our article on how to properly brew pu-erh.

Puer tea: benefits and harms - what more?

In conclusion, we can conclude that this magnificent drink has much more useful properties than harmful. The vast majority of people can consume pu-erh without thinking about any consequences.

This is the case when unsurpassed taste qualities combined with incredible healing power. And what an aesthetic pleasure the very process of brewing a drink delivers ... Undoubtedly, pu-erh begins to cheer up even during preparation. If you care about your body, pu-erh tea will become another good habit for you!

Have a delicious tea!

Green tea:

Green tea is a type of tea obtained from the non-fermented leaves of the Chinese Camellia (Camellia sinensis), which undergo minimal oxidation during processing. Its homeland is China, but it is popular in various parts of the world such as Asia, America, the Middle East, etc. There are many varieties of green tea on the market, differing in growing conditions, processing process and harvesting time.

Beneficial features

Due to the fact that green tea is a rich source of powerful antioxidants called polyphenols, green tea drinkers are less likely to develop heart disease or any type of cancer. Green tea also promotes weight loss. In traditional Chinese and Indian medicine, it is used as a stimulant, diuretic, and astringent to help stop bleeding and speed up wound healing.

Among other things, this tea reduces the risk of esophageal cancer, rheumatoid arthritis, infections and cardiovascular disease. It improves the ratio of bad and good cholesterol, strengthens immune system, and even prevents dental caries by destroying the bacteria that cause plaque.

Side effects

Each cup of green tea contains approximately 40 milligrams of caffeine. Therefore, drinkers of this tea, who are sensitive to caffeine, may suffer from sleep disorders (such as insomnia, sometimes throughout the night), increased blood pressure, anxiety, irritability, palpitations, frequent urination, nausea, loss of appetite, indigestion, tremors, and skin rashes.

Another side effect of drinking green tea is iron malabsorption. Green tea extract reduces the absorption of certain nutrients and non-heme iron by 25% and can cause iron deficiency in the body. Green tea contains caffeine, catechins, and tannic acids, which have been linked to pregnancy risks. Excessive consumption of green tea can cause neural tube defects in the fetus and is therefore highly discouraged. early dates pregnancy.

Green tea is not recommended for children as it contains tannic acids which prevent the body from absorbing nutrients such as proteins and fats. This, in turn, leads to weakening of the bones, deterioration of the teeth, and some types of allergies in children.

Green tea reduces the absorption of thiamine (vitamin B 1), thereby causing alimentary polyneuritis.

Alimentary polyneuritis is a disease nervous system, which leads to weight loss, impaired sensory sensitivity, weakness and pain in the limbs, edematous disease (dropsy) and arrhythmias.

It is also believed that due to high content oxalic acid green tea may be responsible for the formation of kidney stones. Kidney stones are mineral deposits formed from calcium, uric acid, or the amino acid cysteine, and phosphate, or oxalic acid.

Drinking green tea too large quantities can cause skeletal fluorosis, especially in middle-aged people. Green tea does not pair well with certain medicines such as adenosine, blood thinners, some antibiotics, neuroleptics, sedatives, beta blockers, monoamine oxidase inhibitors, some cold and cough medicines, and weight loss products.

People suffering from kidney disease, heart problems, psychological disorders or stomach ulcers should be careful with green tea. However, drinking this drink moderate amounts useful for the body, as it is effective in the prevention and treatment of various diseases.

Warning: This article is for informational purposes only and should not be used as a substitute for the advice of a medical professional.

You've probably heard that green tea has many health benefits, and research backs it up. It has antioxidant and anti-inflammatory properties due to its rich content of micronutrients known as catechins. They help protect and heal the body from various conditions such as colds, flu, and cardiovascular problems. However, like many good things have their drawbacks, green tea is no exception. In this discussion, we'll take a look at it side effects.

Side effects of green tea

1. May get too much caffeine

Although green tea is lower in caffeine compared to other types of tea, it does contain significant amounts. For this reason, too much green tea can affect your nervous system. Avoid taking more than 3 to 5 cups per day.

Note that too much caffeine can lead to palpitations, insomnia, poor appetite, irritability, and restlessness. In addition, consumption is too a large number green tea can cause caffeine intolerance, so you will need to take more of it to achieve the effect that you previously had by taking less.

1. Not good for a sensitive stomach

If you have a sensitive stomach, avoid green tea or take a small amount of. And don't take tea on empty stomach. Green tea can cause stomach problems such as diarrhea, constipation, irritable bowel syndrome, and abdominal pain. If you have stomach problems after drinking green tea, adding milk and sugar may reduce the problem.

1. May increase toxicity levels

Recent studies done on dogs show that taking green tea on an empty stomach can cause toxicity in the stomach, liver, and kidneys. Although human studies have not been performed, it is safer to ensure that you eat before drinking green tea to reduce the effects of this among other side effects of green tea.

1. May react to some drugs

Green tea contains phenophiles that can react with certain chemicals in medications, including ephedrine and amphetamines. For this reason, if you are taking any medication, check with your doctor before taking green tea.

1. May interfere with iron absorption

The catechins in green tea can inhibit the absorption of iron in the body. This can lead to a reduction in the production of red blood cells. It is worth noting that red blood cells carry oxygen to various organs and areas of the body. When your body's number of red blood cells drops, you may suffer from anemia. If you already have anemia, drinking large amounts of green tea may make your condition worse. To avoid this, you need a moderate intake of green tea and food intake, rich in vitamin WITH.

1. May cause harm during pregnancy

If you are pregnant, limit your green tea intake to no more than 2 cups, which contain about 200mg of caffeine in addition to tannic acid and catechins. These chemical substances pose a risk of miscarriage.

Avoid green tea completely in the early months of pregnancy because excess consumption tea can cause your unborn baby to develop a congenital tube defect. Don't let overconsumption green tea even after your baby is born and until you stop breastfeeding.

1. May lead to calcium deficiency

This is one of the side effects of green tea. If you are in the habit of taking excessive amount green tea, you can consume 300 mg or more of its components. This can cause your body to excrete calcium in your urine and eventually lead to conditions like osteoporosis. This is more common in women. It is recommended to take a calcium supplement to replace the ulcerated calcium.

1. May lead to stained teeth

In addition, green tea contains tannins, which can also stick to teeth and stain them. The acid in green tea wears out tooth enamel. Also note that other substances such as coffee, black tea, berries, wine, sauces and juices can stain teeth. However, you can always keep an eye on staining, brush your teeth regularly and brush your teeth with your teeth and especially after drinking green tea.

1. May cause glaucoma

The term glaucoma refers to diseases that affect the optic nerve, which provides communication with the brain. Damage may occur due to high blood pressure in the eye. The caffeine caused by consuming too much green tea can lead to high pressure in the eyes and increase the risk of poor vision in people with glaucoma.

1. May lower testosterone levels

Drinking too much green tea can lower testosterone levels in men's blood since certain compounds in tea react with testosterone and thereby convert it into DHT (dihydrotestosterone), which has been linked to hair loss. Of all the side effects of green tea, this one may be the most worrisome for men.

How to drink green tea to avoid possible side effects

Drinking green tea in moderation is generally safe for most adults. However, if you have stomach problems, low caffeine tolerance, iron deficiency, are pregnant or nursing, you should avoid green tea. Those with anemia, bleeding tendencies, anxiety disorders, heart disease, liver disease, osteoporosis, and diabetes should also avoid green.

Experts recommend taking no more than 3 or 4 cups. Please note, however, that these are only guidelines as the actual amount of tea added to a cup varies. Moreover, if people with certain health conditions take green tea, it may make them feel worse. For this reason, it is recommended that such people take a maximum of 2 cups per day.

Remember that despite the side effects of green tea, it also has many health benefits.

According to legend, around 2700 BC. e. the emperor of China was sitting under a tea bush, and some leaves from the bush fell into his cup with hot water. Thus, green tea was born. It has now been found to be a staple of the Asian diet - containing one of the most potent cancer-fighting compounds known.

Composition and form of release

Form

• capsules,
• Powder,
• Pills,
• Liquid.

Medicinal properties of green tea extract

The drink is made from the dried leaves of the perennial evergreen shrub Thea sinensis. Traditional Process making tea is simple. The leaves are first steamed, then rolled and dried. Steaming destroys the enzymes that would otherwise ferment the leaves. In the manufacture of other types of tea, the leaves are partially fermented (red tea) or completely (black tea). The lack of fermentation gives the drink its unique taste and flavor and, importantly, retains almost all of the natural polyphenols (strong antioxidants that can protect cells from damage). Of the other substances of medical importance, green tea contains fluorides, catechins and tannins.

Mechanism of action

The leaflet states that green tea extract contains compounds that may provide powerful protection against certain types of cancer and possibly heart disease. The use of tea also helps fight infections and prolong life.

Disease Prevention with Green Tea Extract

The incidence of some forms of cancer is lower among the population that consumes this drink. In one large study, Chinese people who drank green tea at least once a week for 6 months were less likely to develop cancer of the rectum, pancreas, and possibly colon than those who drank green tea infrequently or less frequently. didn't drink at all. In women, the risk of colorectal and pancreatic cancer is approximately halved. Preliminary studies have shown that green tea may also prevent breast, stomach, and skin cancers.

Studies aimed at elucidating the mechanism of the anti-cancer effect of the drink revealed the activity of its main antioxidant, epigallocatechin gallate (EGCG). Some scientists claim that EGCG is one of the most effective anti-cancer compounds, protecting cells from damage and supporting the formation of the body's own antioxidant enzymes. According to research, EGCG causes cancer cells to stop reproducing by stimulating natural process programmed cell death - apoptosis. Remarkably, EGCG does not damage healthy cells. Research conducted at the Ohio College of Medicine showed that EGCG inhibits the formation of urokinase, an enzyme needed cancer cells for reproduction. In animals, blocking urokinase results in tumor shrinkage and sometimes complete disappearance.

Impact on the human body

The antioxidants found in green tea extract may also protect the heart. IN laboratory conditions these compounds reduce the damage caused by "bad" cholesterol blood vessels, which is considered the first stage of plaque formation in the arteries. Japanese researchers, observing 1371 patients, showed the connection of daily use of the drink with the prevention of heart disease. In addition, the drink contains fluoride, which protects teeth from caries and has a general antibacterial effect.

Indications for use of Green Tea Extract

• To prevent the development of cancer
• For the prevention of heart disease, lowering cholesterol and weight loss,
• To protect teeth from decay
• To improve brain function, attention and memory,
• To protect against the damaging effects of the sun,
• To prolong life
• With asthma.

Contraindications

If you have a medical condition or are taking medication or other supplements, check with your doctor before taking these supplements.

Side effects

Green tea, both in supplement and beverage form, is safe. However, according to the instructions, people sensitive to caffeine should not drink too much tea, each cup of which contains about 40 mg of caffeine. Due to the caffeine in the drink, pregnant and breastfeeding women should limit their use to 2 cups per day.

Caffeine can lead to addiction and physiological dependence. Abrupt cessation of use may result in withdrawal symptoms such as headache, irritability, nervousness, restlessness, tremors, or dizziness.

Instructions for use

Method and dosage

You can benefit from green tea either by taking the capsules or tablets containing it daily, or by drinking several cups of the drink.

The goal should be to get 240-320 mg of polyphenols per day. When taking supplements, buy standardized forms containing at least 50% polyphenols. At this concentration, two 250mg supplement tablets will provide 250mg of polyphenols. According to instructions required amount polyphenols can be obtained from 4 cups of freshly brewed tea. Supplements with it contain very little caffeine. The recommended dose of supplements contains the same amount of polyphenols as 4 cups of the drink, but only 5-6 mg of caffeine.

How to take Green Tea Extract

• Take supplements with a full glass of water as directed.
• Drink freshly brewed green tea alone or with meals. To make a drink, use 1 teaspoon of leaves per cup of very hot (but not boiling) water. Let the drink brew, strain it and drink

Facts and Tips for Taking Green Tea Extract

• There is a lot of vitamin K in the leaves of the plant, but almost none in a cup of green tea or in supplements. This means that people taking anticoagulants to prevent heart disease (who avoid foods rich in vitamin K due to the vitamin's effect on blood clotting) can enjoy tea without fear of side effects.
• If you drink too much hot drink, you can damage the pharynx and esophagus, which increases the risk of cancer over time. Try the traditional Asian method of application. heat up cold water almost to a boil, or boil it and let it stand for a few minutes, and then pour hot (not boiling!) Water over the tea leaves. This method also helps bring out the delicate scent of green tea.
• Gunpowder tea imported from China is whole green tea leaves rolled into small balls. When hit in hot water leaves are slowly spreading.
• American researchers have found that EGCG, the main antioxidant found in green tea extract, is 100 times more powerful than vitamin C and 25 times more powerful than vitamin E in protecting DNA from damage associated with an increased risk of cancer.

Price in pharmacies

The price of Green tea in different pharmacies can vary significantly. This is due to the use of cheaper components and the pricing policy of the pharmacy chain.

Read the official information about the Green Tea preparation, the instructions for use of which include general information and treatment regimen. The text is provided for informational purposes only and is not a substitute for medical advice.

ABOUT healing properties green tea, probably everyone knows. And many are sure that this delicious drink completely harmless, because it has so many health benefits. But there are hidden dangers in this health drink, which will be discussed: the harm of green tea.

Based on research Tea Council Great Britain (UK Tea Council), it was established that healthy drink at excessive use can cause side effects to human health.

What harm can green tea do?

The harm of green tea is expressed in its side effect, which experts associate with the content of caffeine and tannins (tannin and catechin).

Meanwhile, tea brings great benefit for good health. Read, Green tea prolongs life.

Tannins. According to their effect, the tannins contained in tea leaf, similar to vitamin P, they strengthen the walls of blood vessels and capillaries. The tea itself is given flavor and astringency. But their high concentration in tea irritates the walls of the stomach, they slow down the absorption and assimilation of certain trace elements and can disrupt the functioning of the liver and kidneys.

Caffeine- an alkaloid of the purine series, is a powerful stimulant of the human nervous system, providing a number positive impact on health. But an overdose of the alkaloid causes disruption of the heart, stomach, intestines and other body systems.

With an overabundance, even the most useful products nutrition, the body is in danger, because all products contain chemical elements and biologically active substances which cannot be absorbed by the body indefinitely. Their excessive exposure takes the body out of the comfort zone, causing failures and disruptions in the functioning of organs and systems.

Side effects or why to comply with the norm

Scientists have established a number of side effects that occur more often with an overdose of green tea, which is harmful for both women and men.

Changes the acidity of the stomach

Green tea changes the acidity of gastric juice, increasing it above normal, which causes irritation of the walls of the stomach and can provoke heartburn. Scientists came to this conclusion, studies have shown that tea stimulates the production of stomach acid.

To neutralize its effect on the walls of the stomach, you can add sugar to tea, which, again, is not welcomed by everyone. It is better to drink a drink after a meal or between meals, when the stomach has not yet been freed from food.

People with hyperacidity stomach and peptic ulcer need to be more careful in drinking this drink.

Reduces iron absorption

Since tea is drunk only after a meal, it interacts with substances contained in food. It has been established that caffeine, or rather theine (the variety that is contained in tea, differs in that it is absorbed only in the intestines), reduces the absorption of iron by 25%. This applies more to the non-heme iron found in eggs, dairy products, and plant-based foods.

But this bad influence on the body, fortunately, can be neutralized if added to a cup of tea Fresh Juice lemon or eat before vegetables and fruits saturated with vitamin C (greens from the garden with dark-colored green leaves, tomatoes, broccoli, lemon, currants).

For women, it is important to observe moderation in tea drinking. Often without that, they suffer from anemia and iron deficiency, and large concentrations of tea exacerbate this situation. During pregnancy and breastfeeding, the concentration of caffeine can affect the development of the fetus and the health of the child.

Contributes to the development of chronic headaches

If a person constantly consumes drinks containing caffeine, the body gradually gets used to it. And with a lack of this “doping”, he responds with a long headache. It's kind of caffeine addiction, causing a kind of breakage when it is insufficiently supplied.

Additional intake of drinks solves this problem after 25-30 minutes, but is it worth accustoming your body to such an addiction? If headaches appear due to a lack of caffeine doping, it is better to completely abandon such drinks. After all, these symptoms will gradually increase.

Sometimes people have chronic headaches that turn into migraines. Studying such cases, scientists have found a connection of similar pain with the use of drinks (in large doses) containing caffeine.

Causes anxiety and nervousness, interferes with restful sleep

All these symptoms are more pronounced in sensitive people with overdose. It's all about the substance xanthine, which is a purine base and a precursor of uric acid. Its derivative is caffeine.

His side effect on the human body is the ability to block sleep hormones in the brain, and it also activates the production of adrenaline.

Increases heart rate and blood pressure

Sometimes there is a rapid contraction of the muscles of the heart (palpitations) or abnormal contraction, with rhythm disturbance. As a rule, such failures and violations pass quickly. And if such cases take place, then it is better to talk with your doctor, undergo an examination and identify true reason deviations.

If a person has an increased sensitivity to caffeine and its derivatives, then it is better to refuse drinks containing it in their composition.

You should not get carried away with drinks and people with high pressure, the fact of the effect of caffeine on the increase in pressure is well known.

Causes diarrhea

This feature directly depends on the individual sensitivity of the body. In the lining of the mucous membrane of the digestive organs is concentrated great amount neurons (nerve cells and endings). Therefore, the digestive organs are very sensitive to all chemicals that come with food.

And drinks containing caffeine are rich in organic acids (citric, succinic, malic, oxalic), which stimulate the production of bile. At some point, this plays a positive role.

But accumulations of bile, in turn, trigger mechanisms in response to the effects of biologically active substances that make you run to the toilet. For those who are affected by caffeinated drinks laxative effect, it is better to refuse them.

Promotes heartburn and vomiting

Medical experts acknowledge the fact that caffeinated drinks can cause heartburn. This is explained by the fact that when the mucous membrane is irritated by caffeine derivatives, the production of hydrochloric acid increases.

And since the active substances also have vasoconstrictive abilities, this to some extent disrupts the work of the sphincter, which does not work on time and passes hydrochloric acid into the esophagus.

Do not drink the drink hot, as it irritates the gastric mucosa more and do not work in an inclination after drinking a cup of tea.

An overdose of tea sometimes causes nausea, which turns into vomiting, which is rare. This is also associated with a change in the acidity of the stomach and the irritating effect of active substances on the vomiting center of the brain.

Possible dizziness, ringing in the ears

Caffeine derivatives have insidious properties. In small doses, they increase blood pressure, cause vasospasm, which can cause dizziness.

With an overdose, on the contrary. lower the pressure. And again, they cause weakness and dizziness. You may experience ringing in the ears, especially with high blood pressure.

Causes trembling of the limbs and lack of calcium in the body

Can I drink cold tea

Experts do not recommend drinking as much hot tea, and cold. Hot tea can burn you, and frequent consumption of hot drinks causes a mutation in the epithelial cells lining the throat, leading to the formation of a malignant tumor.

Cold tea, after standing, quickly oxidizes, which leads to the destruction of the vitamins, minerals and active substances contained in it. biological substances. There will be no particular harm from this, just thinking about the usefulness, you will drink a pacifier. But in cold tea, a favorable environment for the reproduction of bacteria is still created.

The biologically active substances contained in green tea, which bring benefits, can be potentially harmful to health if consumed in excessive amounts. The harm of green tea for the body lies only in this reason. If you follow the rule of the golden mean, then all problems will go aside.

The judicious use of tea turns the caffeine and tannin contained in it into friendly substances that bring only health.

• And in this article, read about the benefits:

Drink tea wisely and be healthy!

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