A person whose body consists of 70% liquid, it is vital to drink enough water. It is necessary for the normal course of all processes in our body. But what is the best water to drink? Liquid that flows from the tap into big cities, unsuitable for drinking, so many people prefer to boil water. But is everything so simple? Is it good to drink boiled water or is it a complete harm? These questions need to be dealt with in more detail.
In physics, boiling is understood as the process of transition liquid state into vapor, accompanied by the appearance of bubbles at a temperature of 100 degrees. Conventionally, the boiling process is divided into the following stages:
- Small single bubbles appear at the bottom of the container, which then rise to the surface of the water and are grouped mainly at the walls of the vessel.
- There are a lot of bubbles. They provoke turbidity, and then whitening of the liquid. This stage is also known as the "white key" because the process is similar to the running of spring water. Tea lovers often remove the kettle from the stove at this stage, preventing the water from boiling.
- Then there is intense seething, bursting of large bubbles and strong highlight pair. Water splashes out of dishes.
The benefits and harms of boiled water still raise a lot of doubts. Boiling tap water solves the following problems:
- Kills microorganisms;
- Reduces water hardness;
- Reduces chlorine content.
This is the main benefit of boiled water. Hard salts remain in the form of sediment at the bottom of the container, most of bacteria die. In particular, boiling is relevant in the hot season, when, despite chlorination, the number of microorganisms in the water becomes larger.
However, boiling does not destroy the hepatitis A virus, the botulism bacillus. In addition, if the water is standing for a long time, bacteria can get into it again. Therefore, boiled water, the benefits and harms of which are not so obvious, cannot be stored for several days. Boiling makes water softer. At the same time, the concentration of certain salts becomes higher due to the evaporation of the liquid.
Danger and harm of boiled water
However, studies show that boiling does not cope with all microbes. So, in order to kill the hepatitis virus, you need to boil water for half an hour. A botulism stick can disappear only after fifteen minutes of boiling, and its spores die in no less than five hours! Of course, no one will boil water that much. Also, the harm of boiled water lies in the fact that active pesticides, nitrates, heavy metals, phenols, oil products are not destroyed in it. And a number of useful components in water, such as calcium and magnesium salts, settle on the walls of the vessel.
It is also worth considering that boiling, especially for a long time, causes a clear decrease in the volume of water. A precipitate forms in the liquid that remains. If you add raw water to the settled water and boil them together, the percentage and concentration of heavy water will increase. And this poses a serious threat to health. Therefore, experts insist that it is by no means possible to dilute boiled water with unboiled water.
Many believe that the benefits of boiled water for the body is that it is purified from chlorine. But studies have shown that this microelement, when boiled, begins to interact with other compounds, which can cause the formation of dangerous trihalomethanes. Also, heating the water causes oxygen to escape from it.
Answering the question of whether boiled water is healthy, many experts believe that it becomes “dead”, therefore it cannot bring any value. It does not saturate the body with valuable minerals and the moisture that it needs. It is also known that after some time after boiling, the water is again infected with various microorganisms, which can be in the kettle or simply fly in the air. Although, of course, this is quite a significant time for us to have time to drink tea. Be that as it may, boiling cannot be considered a 100% way to purify water from everything that can be harmful to our body.
Is there any benefit in boiled water?
Understanding whether boiled water is good for drinking, it is worth noting that it is softer than tap water. Drinking water that has been boiled once is believed to improve mental and physical activity, removes toxins from the body, improves blood circulation.
Some traditional healers recommend drinking warm boiled water, especially on an empty stomach. Speaking about the benefits of boiled water in this form, they highlight its ability to improve metabolic processes and accelerate the breakdown of fats. In fact, any pure water has such an effect if you heat it, because the point is not in boiling.
Is boiled water good or bad? This process really makes it better for the body than tap or well water, which contains a lot of bacteria and aggressive particles. But boiling does not make the water in the form in which it is completely healthy and safe. It is recommended to use it only if you have no other way to purify the water. Then it will help reduce the risk of poisoning and other negative consequences. But it is recommended to boil water for at least 8-10 minutes, which our usual electric kettles are not designed for. When using boiled water, remember that it is undesirable to store it in a container where it was boiled. It is best to pour it into a glass container. The kettle must be descaled before turning it on.
Another important question is whether it is harmful to boil water a second time. Here it is worth considering the following points:
- Boiling takes away the taste of water. Water that you boil several times will not taste good at all. It may have an unpleasant metallic taste.
- Boiling does not kill impurities and salts. The more often the water is boiled, the more oxygen evaporates from it, and the higher the concentration of these salts becomes. The drink becomes toxic and, although this toxicity is small, it tends to accumulate, therefore Negative influence will be present.
- We usually boil chlorinated water. Chlorine, as we have said, when heated, reacts with organic matter and forms dangerous toxins. The more water is boiled, the higher their concentration. Based on this, the answer to the question of whether repeated boiling of water is harmful or not can be positive.
Thus, water boiled several times retains very little of the benefit that our body needs from drinking water. And the more you boil it, the more "dead" it becomes. Having found out whether it is harmful to boil water several times, we can conclude that it is better to limit yourself to a single boil.
So what is the best water to drink?
If you want to drink water with health benefits, then it is best to use not boiled, but specially purified water. For this, special filters can be used, which are not a problem to buy today. They help purify water from heavy metals, chlorine, bacteria and other harmful components. There are filters in the form of jugs, as well as filters that are installed directly on the water pipe, and already purified water flows from the tap. Also a good option- Drinking bottled water. It is guaranteed to be cleaned and does not cause any harm to the body.
If the water that you have access to now does not inspire confidence in you, it is better to boil it and protect yourself from poisoning and other unpleasant consequences. Indeed, in which water is more useful: boiled or raw, the choice is definitely on the boiled side (of course, if the raw water has not been purified). Therefore, it is strongly not recommended to use tap water, but you can resort to boiling - sometimes it makes life much easier and protects us. Monitor the quality of the water you drink.
Any zealous housewife knows that water intended for drinking can be boiled no more than once. However, the physical and chemical mechanism of this prohibition can be explained only in the field of molecular physics and chemistry. Despite the preservation of the organoleptic characteristics of the liquid during boiling, its structure and composition of substances change. Why you can not boil water twice, the scientific fact is confirmed by experiments. This phenomenon caused by several reasons.
Physical and chemical characteristics of water
The structure of the water molecule is known from the course school chemistry. It consists of two hydrogen atoms connected to one oxygen atom. The chemical formula of water is H2O. The liquid is colorless, transparent, tasteless and odorless. Tap water and natural water (river, lake, spring) contain many dissolved mineral chemical impurities, most of which are harmful to the human body. In addition, natural water contains complex macromolecular organic compounds, microflora and microfauna.
Why you can't boil water twice is a scientific fact
The main purpose of boiling water is to destroy harmful and pathogenic microorganisms that die when the temperature of the liquid rises.
Without denying the correctness of all the scientific facts presented, a completely legitimate question arises - Why can't you drink distilled water? ? There are no prohibitions here, but it has been noticed that the distillate, which has neither taste nor smell, also negatively affects human health. Moreover, there is no consensus among scientists about the causes of this phenomenon. According to some scientists, in distilled water, which has passed the stage of steam and then re-condensed, the direction of the charge changes and the magnitude of the dipole moment changes. To restore the original properties, some healers recommend distilled water, which has a high degree cleaning and from the point of view of chemistry absolutely harmless to humans, freeze. For drinking and cooking, it is recommended to use melted liquid.
Why can't you boil water a second time? - Unfortunately, many do not know the answer to this question, and every day they make a mistake, not draining old water from a teapot. But this ban has been known for a long time, but most simply turn a blind eye to it in order to save water and pay for public Utilities. In this article, you will find comprehensive information on why it is harmful to boil water several times.
Why boil water?
As you know, no one can live without water. creature whether plant, animal, microorganism or human. 80% of our body consists of liquid (in infants - 90%). Fresh water is simply necessary for us for normal metabolism and removal of toxins and slags from the body.
Unfortunately the problem is clean tasty water v modern world more than relevant:
- in villages where one could previously find pure springs, now they are no longer completely clean due to soil contamination;
- in the city water, to reach the apartment, you need to go through kilometers of pipes of dubious purity.
Important! Naturally, in the latter case, the liquid is disinfected with special substances, for example, using bleach, but this spoils the taste and smell of water, and it does not help much. Regarding cleaning systems, their effectiveness is very controversial, because in some cities they have not changed for several decades.
Conclusion regarding quality drinking water deplorable. In order to at least somehow correct the situation, people began to boil the liquid. The purpose of this process is one - to kill all the bacteria and microbes that are in raw water, that is, to literally sterilize it.
Indeed, most microorganisms die under the influence of high temperatures. Then why shouldn’t water be boiled many times, because doctors recommend using only the liquid that was boiled once to make tea or coffee, be sure to pour out the old residues. To deal with this recommendation, consider the physical and Chemical properties ordinary water.
What happens to water during boiling?
Let us consider in detail what changes occur at the moment the temperature reaches 100 degrees Celsius with the composition of H2O:
- During the boiling process, oxygen and water molecules evaporate.
- Since all water contains a large number of impurities, you should know that after boiling they do not go anywhere. Moreover, their concentration increases, as the liquid itself becomes smaller due to the evaporation of water molecules. Particles of dirt and salt settle on the bottom of the kettle, forming a white scale.
Important! That is why sea water even after boiling it is unsuitable for drinking.
- All pathogenic bacteria, viruses and microbes are destroyed.
Important! It is a mistake to think that each subsequent boil kills everything. large quantity harmful microbes, viruses and bacteria. All harmful microorganisms die at the first heat treatment at 100 degrees Celsius.
- Water molecules contain heavy chemical elements are isotopes of hydrogen. They are resistant to temperatures up to 100 degrees and settle to the bottom during the boiling process. Thus, the liquid becomes more "heavy".
Can you boil water multiple times?
A large number of people do not drain the old, previously boiled liquid, and boil it again to make themselves tea. Is it bad to boil water a second time? - Let's look into this matter.
Boiled water is completely tasteless
If a fresh transparent liquid does not already have a special taste, then boiled one loses even its remnants. And if you boil water several times, then it turns into a very tasteless one. To understand the difference, you can conduct an experiment:
Boiling makes water "dead"
The more often and more water undergoes processing, the more useless the resulting liquid is. When boiling, the chemical formula of H2O is violated, as oxygen leaves the liquid. The water becomes dead.
The amount of impurities increases
With each subsequent boiling of the same liquid, the concentration of salts increases. Naturally, the human body does not immediately feel such changes, and the toxicity of such a liquid is a negligible percentage. But all reactions in “heavy” water are slower, and deuterium, an element that is released from hydrogen during boiling, tends to accumulate, which brings undoubted harm to the body.
Important! "Heavy" water looks the same as ordinary water, and chemical formula has the same - H2O, but instead of light hydrogen atoms (protium) it contains heavy hydrogen atoms (deuterium).
Dogs, rats, mice and other mammals die after about a week of regular consumption of such water due to the replacement of more than 25% of light hydrogen in tissues by heavy hydrogen. A person without harm to health can theoretically drink two glasses of "heavy water". In this case, after a few days, the deuterium will be completely eliminated from the body.
Carcinogens are formed
As a rule, the water that we boil for our food needs is treated with bleach. In the process of heating to 100 degrees Celsius, chlorine enters into chemical reaction with organic substances, resulting in the formation of carcinogens. This is another one of the significant reasons why water should not be boiled repeatedly. With each subsequent heat treatment, the concentration of carcinogens increases, and these substances are known to provoke the development of cancer in the human body.
How to boil water correctly?
Boiled liquid is already of little use, but its repeated processing makes it harmful. Therefore, before the next procedure for heating water for tea, follow these simple rules:
- Use fresh water each time you boil.
- Is it possible to boil water a second time? You can, but you definitely don't need to! Do not boil again, as well as add fresh liquid to the treated residues.
- It is advisable to let the water stand for several hours before boiling.
- When using a thermos, do not close it with a cork immediately after pouring boiling water into it. Do it in a few minutes.
- Keep an eye on the container in which you boil water. Immediately descale the kettle - for this you can use citric acid or vinegar.
- No need to think long about how much water to boil. Wait for the water to get white shade from saturating it with air bubbles and turn it off. Don't wait until it starts bubbling and splashing. Remember that the longer the water boils, the less it becomes and the higher the concentration of carcinogens. That's why you can't boil water for a long time.
Important! Boiling for more than 20 minutes completely changes the structure of the water.
Probably, every person already knows that water is the most important substance for the functioning of all organs and systems of our body. All doctors strongly recommend that both children and adults drink enough ordinary clean water. And no juices, compotes and other drinks can become a worthy replacement for it. But the opinion of doctors and ordinary people about what kind of water is better to drink does not always coincide. So many people are wondering why you can't boil water twice: is it a scientific fact or a fallacy is this opinion about it?
Many doctors advise their patients to drink water that has only been boiled once. In other words, before adding new liquid to the kettle, pour the rest into the sink. But there are people who are sure that prolonged boiling is guaranteed from various harmful impurities. Who is right anyway?
V Everyday life we usually use tap water. And it, as everyone knows, has in its composition a lot of various substances, including those that are not very beneficial to health. It contains not only chlorine, which is necessary for disinfection, but also various heavy compounds. Therefore, it is strongly not recommended to take such water without boiling.
When water boils, organochlorine compounds are formed in it. And the longer the boiling process lasts, the more such compounds are formed. They are represented by dioxins and carcinogens and are capable of exerting a depressing effect on the cells, tissues and organs of our body. But the negative impact will not be noticeable immediately, because aggressive substances accumulate in the body for a long time, and then lead to the development of serious, including chronic health problems.
Probably, everyone noticed that boiled water has a completely different taste than "fresh". This feature is also explained by the presence of dioxins in its composition. Increasing their amount softens the water.
It is worth noting that chlorine from unboiled water harms the body much more. Therefore, you should not drink water just from the tap. Pediatricians even advise bathing newborns in boiled water. Excess chlorine can lead to skin flaking, itching and other backfire especially on delicate baby skin.
What is fraught with prolonged boiling?
The answer to this question is hidden in the above information. Since the boiling process is accompanied by the formation of dioxins, the amount of these compounds increases with prolonged boiling. However, it is worth noting that in order to obtain their critical level in water, it will have to be boiled far more than once.
It should not be forgotten that the taste of water changes markedly when boiled. Thus, a liquid boiled twice will already be far from ideal and will be able to change somewhat. taste qualities brewed tea or coffee. Quite often, water is re-boiled in different offices, when employees are just too lazy to run for new portion.
Is re-boiling really dangerous?
No specialist can give a definite answer to this question. With each boil carried out, the amount of organochlorine compounds in the water increases, but their level still does not rise to such an extent as to cause serious poisoning or death. So, the most obvious minus of repeated boiling is the change in the taste of water, which spoils the drinks prepared on its basis, making it difficult to enjoy the fullness of their taste.
At the same time, scientists emphasize that the number of aggressive particles (microbes) in boiled water decreases after the first boil. And turning the kettle on again does not affect their viability in any way. After all, what could not survive when the temperature reached one hundred degrees has already died, and the particles that can stay alive will remain even with repeated boiling.
Boiling allows you to purify water from hardness salts, because they have a lower boiling point. Such particles settle on the walls of the kettle, like scale, which is visible to the naked eye.
Which can be said for quite a long time, yet it is more beneficial for the body than tap water. And the decision to boil it again or not, a person must make on his own, focusing on the information provided above. Once again, I would like to emphasize that organochlorine compounds are still released during repeated boiling, albeit in a small amount, and no one knows what this can be fraught with for the body. Therefore, it is better not to risk your health and not be lazy to change the water in the kettle to fresh.
In order for boiled water to bring only benefits to the body, you need to follow a few recommendations:
For boiling, it is worth using only fresh water each time;
- do not boil the liquid again and add fresh to its remains;
- before boiling water, leave it for a few hours to stand - so part of the aggressive substances and chlorine will disappear from it;
- after pouring boiling water into a thermos, do not cork it immediately, it is better to wait a couple of minutes.
Folk recipes
So, it is clear to every person how important it is. But the consumption of insufficient quality water can lead to the development of various pathological conditions. So, if the liquid for drinking contains too much calcium salts, stone formation in the kidneys may begin. Remedies will help to cope with such a problem. traditional medicine.
So with nephrolithiasis, you can use bird knotweed. Brew three tablespoons of fresh and chopped herbs with half a liter of boiling water. Infuse the medicine for four hours, wrap it well, then strain. Take half a glass on an empty stomach in the morning. Appropriateness of treatment folk remedies must be discussed with the doctor.
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Everyone knows that drinking tap water is extremely harmful. But not everyone has the opportunity to buy bottled water or use special filters. Since time immemorial there has been one reliable way water disinfection - boiling. In the days of our mothers and grandmothers, many had a container of boiled water in the kitchen and children were ordered to drink only from it! Using the same water, some brewed tea or coffee, boiling it again in this way.
And today, many often boil water several times, mainly for tea or coffee, being too lazy to pour out the liquid left in the kettle from the last time. This is especially true for offices, where one kettle is poured in the morning and water is boiled in it again every time someone wants to drink tea.
But will such a habit harm the body? Some supporters healthy lifestyle life argue that it is impossible to boil water again in any case. How right are they?
To begin with, we will tell you what impurities are contained in tap water. Firstly, this is a considerable amount of chlorine, which is used to clean it, but it can irritate the skin and mucous membranes, and in large doses contribute to the occurrence oncological diseases. Secondly, these are calcium and magnesium salts, which, when boiled, settle on the inner walls of the kettle - the well-known scale. Thirdly, heavy metals such as lead, strontium and zinc, with high temperatures forming carcinogenic compounds that provoke the occurrence cancer cells. And fourthly - viruses, bacteria and similar microflora.
Water "living" and "dead"
What happens to all these substances during boiling water? Definitely, bacteria and viruses die at the first boil, so this is simply necessary to disinfect water. Especially if the water is taken from a dubious source - a river or a well.
Heavy metal salts, unfortunately, do not disappear from water, and when boiled, their concentration can only increase due to the fact that a certain volume of water evaporates. How more number boiling, the higher the concentration of harmful salts. But, according to scientists, their number is still not enough to cause significant harm to the body at a time.
As for chlorine, during boiling it forms a lot of organochlorine compounds. And the longer the boiling process lasts, the more such compounds appear. These include carcinogens and dioxins that can have a negative effect on cells. human body. Scientists in the course of laboratory studies have found that such compounds appear even if the water was purified with water before boiling. inert gases. Of course, the harmful effect of such water will not be noticeable immediately, aggressive substances can accumulate in the body for quite some time. long time, and then lead to the development serious illnesses. To harm the body, you need to drink such water every day for several years.
According to the British Julie Harrison, who has extensive experience in researching the impact of lifestyle and nutrition on the occurrence cancerous tumors, each time the water is boiled, the content of nitrates, arsenic and sodium fluoride becomes higher. Nitrates are converted to carcinogenic nitrosamines, which individual cases cause leukemia, non-Hodgkin's lymphoma and other cancers. Arsenic can also cause cancer, heart disease, infertility, neurological problems and, of course, poisoning. Sodium fluoride adversely affects the cardiovascular system, and in large doses can lead to sudden drops blood pressure and dental fluorosis. Substances that are harmless in small quantities, such as calcium salts, repeated boiling waters become dangerous: they affect the kidneys, contribute to the formation of stones in them, and also provoke arthrosis and arthritis. Especially not recommended repeatedly boiled water for children, because the high content of sodium fluoride in it can seriously harm their mental and neurological development.
Another fact in favor of the inadmissibility of repeated boiling is the formation of deuterium in water - heavy hydrogen, the density of which also increases. Ordinary water turns into "dead" water, the constant use of which threatens with a fatal outcome.
However, scientists are of the opinion that the concentration of deuterium in water, even after several heat treatments, is negligible. According to the research of academician I.V. Petryanov-Sokolov, to obtain one liter of water with a lethal concentration of deuterium, you will have to boil more than two tons of liquid from the tap.
By the way, water boiled several times does not change its taste better side, so that tea or coffee made from it will not be what it should be!
To boil or not to boil?
Boiled water is still more beneficial for the body than water straight from the tap. So a single boil is quite reasonable. But it is better to refuse the repeated one, since organochlorine compounds are clearly released with it, even in small quantities, and this is fraught with the body later. It is much easier to acquire a new habit: before each tea party, fill the kettle with fresh water, giving it a little “breathe” beforehand - to weather chlorine and other harmful substances. And be sure to clean the kettle from scale!
