Why can't you boil water twice: is it a scientific fact or a myth?

What happens to water when it boils?

Each of us boils water. Some use it as a drink, additionally cooling. Most make tea. Very often you can hear that water cannot be boiled twice. There is an opinion that such a liquid becomes dangerous to humans. This is explained by the fact that even with a long first heating, useful microelements disintegrate. In the second boiling, there is allegedly nothing useful left in the water at all.

Boiling is necessary in most cases. Tap water can harbor harmful bacteria. They die already after 2-3 minutes of heat treatment. But it is worth noting that some dangerous microorganisms are not afraid of high temperatures. In this case, boiling is powerless to cope with the problem. Also, in this way, salts of heavy metals cannot be removed from the water.

It is believed that water should not be boiled twice due to the fact that it can become "heavy". From a chemistry point of view, this is a myth. Heavy water is almost impossible to create at home. This is a complex process. This result is affected only by long boiling over many years.

In addition, heavy water is not fatal to humans. It is relatively quickly excreted from the body.

The quality of boiled water may depend on the type of kettle. Many people do not boil water twice in plastic electric kettles. They believe that there is a reaction with the plastic. In fact, if the polymer is approved for use as a material in which water is heated, then it is safe.

Highly chlorinated water can be harmful to health. It already reacts with plastic during the first heating. Various hazardous substances begin to be released into the liquid. They can also be preserved by re-boiling. Therefore, the problem is rather not in the secondary boiling, but in the composition of the water. Before heating in an electric kettle made of plastic, it must be defended in a glass container.

The possibility of harm from secondary boiling can also be if the kettle is made of low-quality material, in which plasticizers are added. These substances make the plastic less brittle. They begin to stand out during heating.It turns out that we drink water or tea with a dose of plasticizers. Therefore, you should not buy cheap Chinese appliances. Cost is a direct indicator of the quality of plastic. The service life of kettles made of safe material is 3 years. After that, it is better to replace it with a new one.

Benefit reduction

In fact, everything is not as sad as it sounds in this subtitle. It should be explained. And again we turn to the chemical composition of the white liquid, which, in addition to distilled water, also contains a certain amount of various impurities. This is especially true of tap water, which is subjected to various cleaning methods, including chlorination. So, when boiling, only water molecules can evaporate, and all these harmful impurities remain. Moreover, due to the fact that part of the liquid turns into vapor, the concentration of such impurities increases. That is why it is considered sterile, but not free from various harmful substances.

Rules for drinking boiled water

In order to feel the healing properties of boiled water, you should follow the rules of use.

• For cleansing and detoxification drink several times a day. Boil for at least 5 minutes so that it is better absorbed by the body and has the desired detoxifying effect. It is recommended to boil once and pour into a thermos, and then drink in small sips throughout the day.
• It is not recommended to mix boiled and raw water. Since in this case, unwanted compounds that are harmful to the body may appear. The same answer will be to the question: “Why can’t you boil water again?”.
• Boiled water is not stored in the container in which it was boiled.
• Useful properties of water disappear after 6 hours after preparation, so during this time it must be consumed.

Boiling water before drinking is a personal choice. For example, for supporters of the Ayurvedic movement, boiling water not only represents a hygienic aspect, but also symbolizes liberation from negative energy and protection of one's own body. The need for boiling is also highly dependent on local conditions. In any case, the water obtained during a hike in the open air must be boiled.

Is it possible to re-boil in the kettle

Distilled liquid is colorless, has absolutely no taste and smell. Natural water and from the central water supply contains impurities of chemicals, some of which can harm human health. The natural environment is inhabited by microflora and microfauna.

Proponents of healthy eating oppose boiling in general. They believe that such a liquid is useless. But doctors and adherents of evidence-based medicine are confident in the need for heat treatment to get rid of pathogens. In consumer terms, boiling is a necessity. After all, a way to brew tea with cold water has not yet been invented.

Important! The culture of boiling water is firmly established in all families. And the kettle, almost like a samovar, has become the center of the kitchen

Is re-boiling possible and why? Some experts argue that it is impossible.

For example, Elena Malysheva, in her TV show Health, talks about boiling water from a water supply system like this: most microbes, viruses and bacteria die at such high temperatures. But the liquid consistency itself “dies” at the same time. In addition, chlorine, when heated, forms organic compounds dangerous to the human body. Carcinogens cause mutations in healthy cells, promote the development of cancer.

Scientific Facts About Reboils

Evaporation during boiling increases the concentration of salt and other impurities in the water - this is the main argument about the dangers of boiling again. In this case, cooking liquid dishes such as soup or compote should be completely prohibited. Indeed, in the process of cooking, the liquid component evaporates, and the dishes are saturated with salt and other substances. This includes any culinary product that requires cooking.

Boiling the same water several times makes the liquid heavier. It contains a large amount of the hydrogen isotope, deuterium. In fact, it is so small that in order to concentrate it in dangerous volumes, you need to boil a tank of liquid.

Is it possible to add fresh water to already boiling water? Can. The opinion that heavy compounds accumulate in the residue is false. Heating is the random movement of molecules. It is unlikely that some of them move only at the bottom.

Reference! Modern water treatment facilities do not use chlorine-based products. For this, filtration and ozonation are used.

If it so happens that the water from the tap is really cleaned with chlorine. You just need to stand it for thirty minutes. During this time, the chlorine compounds will evaporate.

Why does the body need water

The human body consists of 80% water. However, not everyone knows that the volume of fluid can be in the range of 30-50 liters, it depends on age characteristics: the older the person, the less fluid in the body.

In the body, it is distributed as follows:

• Cells - about 28 liters;
• Free liquid - 10 l;
• Blood, gastric juice, saliva, bile, etc. - the rest of the volume.

Water performs the following functions in the body:

• Supports body temperature;
• Prevents constipation and improves bowel function;
• Removes toxins and other harmful substances from the liver and kidneys;
• Dissolves nutrients that enter the body with food;
• Acts as a lubricant for the joints;
• Takes part in metabolism;
• Stimulates the excretion of viruses and bacteria through biological fluids (urine, sweat).

Benefits of boiling water

So is it useful to drink boiled water, or all these are myths. When boiled, water becomes healthy and provides the body with several benefits.

• First of all, it improves metabolism and therefore helps to lose weight.
• Promotes proper hydration and detoxification of the skin. If the water temperature is higher than the environment, the effect will be even stronger. Cells that increase skin elasticity and are susceptible to harmful free radicals are restored.
• An excellent natural remedy for colds, coughs and sore throats. It dissolves phlegm and also helps to remove it from the respiratory tract, also relieving sore throat and preventing nasal congestion.
• Improves blood circulation, which is necessary for proper muscle and nerve activity. In addition, it keeps the nervous system healthy.
• Regulates digestion.

Boiling the water makes it cleaner and the body has to fight off fewer bacteria. Thus, there is more energy in boiled water, because the body does not need to expend its energy on purification.

What does repeated boiling with water do?

Doctors advise using only water that has been boiled once to make tea and coffee.That is, each time the kettle must be completely renewed, pouring out the remnants of the old liquid before adding a new one.

What is the prejudice about re-boiling? Why can't you boil water twice? We will have to touch not only the physical, but also the chemical properties of the precious moisture.

What happens to water when heated?

Without water, the human body cannot exist. Eighty percent of our body consists of liquid. Fresh water is necessary for normal metabolism, removal of toxins from the body.

But there are certain problems with water in the modern world. Not every resident of the metropolis can get the required amount of liquid from a well or natural source. In addition, we must not forget about the natural pollution of the modern world. Life-giving moisture enters our homes through miles of pipes. Naturally, disinfectants are added to it. For example, chlorine. If we talk about cleaning systems, then their quality leaves much to be desired. In some cities, they have not changed for decades.

Boiling was invented to use this water for cooking and drinking. There is only one reason - to destroy, if possible, all the bacteria and microbes that are in raw water. There is an anecdote on this topic:

The girl asks her mother:

Why are you boiling water? To kill all microbes.

Is it that I will drink tea with the corpses of microbes?

Indeed, most bacteria and microbes die under the influence of high temperatures. But what else happens to the composition of h3O when the temperature reaches 100 degrees Celsius?

1) Boiling evaporates oxygen and water molecules.

2) Any water contains certain impurities.At high temperatures, they do not go anywhere. Is it possible to drink sea water if it is boiled? At 100°C, oxygen and water atoms will be removed, but all salts will remain. But the most interesting thing is that their concentration will increase, as the water itself has become less. Therefore, sea water after boiling is unsuitable for drinking.

3) Hydrogen isotopes are present in water molecules. These are heavy chemical elements that are resistant to temperatures up to 100°C. They are sink to the bottom, "weighting" the liquid.

Is re-boiling dangerous?

Why do it? The bacteria died during the first boil. There is no need for re-heat treatment. Too lazy to change the contents of the teapot? Well, let's figure it out, is it possible to boil again?

1. Boiled water is completely tasteless. If it is boiled several times, it becomes very, very tasteless. Some may argue that raw water also has no taste. Not at all. Do a little experiment.

Drink at regular intervals water from under faucet, filtered water, boiled once and boiled many times. All of these liquids will taste DIFFERENT. When you drink the last version (boiled many times), there will even be an unpleasant aftertaste in your mouth, some kind of metallic taste.

2. Boiling "kills" water. The more often the heat treatment occurs, the more useless the liquid is in the long run. Oxygen evaporates, in fact, the usual formula of H2O is violated from the point of view of chemistry. For this reason, the name of such a drink arose - "dead water".

3. As mentioned above, after boiling, all impurities and salts remain. What happens with each reheat? Oxygen leaves, water too. Consequently, the concentration of salts increases.Of course, the body does not immediately feel it.

The toxicity of such a drink is negligible. But in "heavy" water, all reactions occur more slowly. Deuterium (a substance that is released from hydrogen during boiling) tends to accumulate. And this is already harmful.

4. We usually boil chlorinated water. In the process of heating to 100 ° C, chlorine reacts with organic substances. As a result, carcinogens are formed. Frequent boiling increases their concentration. And these substances are extremely undesirable for humans, as they provoke cancer.

Boiled water is no longer useful. Re-processing makes it harmful. Therefore, follow these simple rules:

• for boiling each time pour fresh water;
• do not boil the liquid again and do not add fresh liquid to its remains;
• before boiling the water, let it stand for several hours;
• after pouring boiling water into a thermos (for preparing a medicinal collection, for example), close it with a cork after a few minutes, not immediately.

Drink for health!

Why can't you boil water twice?

For many, heat treatment has been and remains the only way to purify water from harmful impurities and microorganisms. Some people, seeking to increase the degree of purification, bring life-giving moisture to a boil two or even three times. Why can't you boil water twice and what does it threaten health, we will tell in our article.

Why does the body need water?

Almost everyone knows that the human body is 80% liquid. But few people know that its volume ranges from 30 to 50 liters depending on age: the older the person, the smaller its share.

Most of the water is contained in the cells: the volume of intracellular fluid is approximately 28 liters.In second place in terms of water content is free liquid - up to 10 liters, followed by blood, intestinal and gastric juices, lymph, cerebrospinal fluid, bile and saliva.

Water, constantly circulating through the body, takes part in all metabolic processes. With its help, toxins, dead cells, viruses and bacteria are removed through sweat and urine. We already wrote “How much water do you need to drink to be healthy”, so now we will not touch on this issue, but we will focus on why you can’t boil water twice.

Why is it said that water cannot be boiled twice?

Boiling is perhaps the only method of water disinfection available to everyone without exception. Many people use it to disinfect tap water, and almost everyone uses it when brewing coffee and tea. Sometimes we are too lazy to replace the liquid once brought to 100 ° C with a new one, and then we hear from our mothers that it is impossible to boil water twice. Let's see if this is the case.

How does heat treatment affect the quality of a liquid? Any water, unless, of course, you are dealing with distilled water, in addition to hydrogen and oxygen, contains a lot of impurities, including:

calcium and magnesium salts, which are deposited on the walls of the kettle during boiling, but do not pose a particular threat to the human body;

heavy metals: strontium, lead, zinc, capable of forming carcinogen compounds at high temperatures, causing oncological diseases;

chlorine, which irritates the skin and mucous membranes and provokes the appearance of cancer cells;

viruses and bacteria, both pathogenic and completely harmless.

During boiling, H2O evaporates, but heavy metal salts do not disappear, and their concentration in the liquid increases. True, scientists assure that they are still not enough to cause significant harm to the body.

In addition, during heat treatment, “light” hydrogen escapes, but “heavy” (isotopes of hydrogen) remains. Moreover, its density increases, and "living" water turns into "heavy", saturated with deuterium. Regular use of such water leads to death.

However, according to studies conducted by Academician I. V. Petryanov-Sokolov, to get 1 liter of deadly water, 2163 tons of tap water will be required. In other words, the concentration of deuterium in twice boiled water is so small that it is not worth worrying about.

As a result, of all the consequences of double boiling, the following can be distinguished as harmful:

change in the taste of the liquid is not for the better;

“live” water, losing the microorganisms necessary for a person during heat treatment, turns into “dead”, i.e. useless;

the formation of chlorine-containing carcinogens and an increase in the concentration of heavy metals.

That's why you can't boil water twice, however, and one-time heat treatment leads to the same results.

How to get "living" water?

Not everyone has the opportunity to drink spring water or purify tap water with expensive filters. For them, there is an easy way to get usable life-giving moisture.

Collect water in a jar and, without closing it with a lid, let it stand for a day. During this time, most of the chlorine will evaporate.Then freeze it in the refrigerator (just keep in mind that when freezing, water expands, and the jar, if it is full and closed, may burst), but not completely: let a puddle remain on the surface. This is "dead" water with a high content of deuterium - it turns into ice last. Drain it, after which the ice can be thawed and drunk.

Listen to a few more tips from a nutritionist who knows how to purify water at home:

Which water is healthier - boiled or raw

Both raw and
boiled water has its fans. Each of them assures that it is their water
better for the body.

raw water fans
boiled is considered processed, while raw is advertised as
100% natural with unique flavors and benefits. Raw Followers
argue that boiling removes minerals. So they count raw water
more nutritious and beneficial. It, in their opinion, contains probiotics, useful
bacteria, trace elements. Raw water is filled with oxygen, which disappears when
boiling. Many are interested in which water boils faster - raw or
boiled. In this case, the payoff is for raw. It is oxygenated and
it is not boiled.

But not any raw
water can be considered clean and drinkable. Without proper processing
may contain various chemical contaminants, hazardous elements. And sometimes
the benefits of raw water may be far below the actual risks.

Followers
Indian Ayurvedic medicine believe that drinking boiled water is very important
not only in terms of hygiene. Ordinary water in addition to useful
substances contains negative information

This information is transmitted to the person, and
not necessarily useful to him. Water even visually changes as a carrier
information when exposed to various circumstances and then
viewed under a microscope. Water after boiling becomes neutral, changes its physical properties and leaves room for new information that can be consciously created in the human body.

How to get rid of the unpleasant consequences of boiling?

It should be said right away that even the initial boiling of the liquid is not entirely useful. The process of heating water leads to the destruction of bacteria and to a more active movement of impurities, which can settle for a very long time. But, applying simple tips in practice, you can, if not completely get rid of the harmful effects of boiling, then at least minimize it.

• Before boiling the liquid, let it stand in a clean container for at least two or three hours. Even if she had previously gone through a system of super-efficient filters.
• Closing the lid of the brewing container immediately after adding boiling water is highly discouraged. A greater influx of oxygen will neutralize some of the harmful impurities on the surface of the hot drink.
• Never mix hot boiled water with cold water. Many people like to cool their drink in this way, but in fact they only add a fresh portion of harmful microorganisms to it.

And the main advice: after the first boil, change the water in the kettle. Such a useful habit allows you not to boil the liquid several times.

Is a microwave suitable for heating water?

Modern microwave ovens are suitable for boiling water. But a feature of the process will be that bubbles on the surface, even when reaching 100 degrees, will not appear as in a teapot.You can see that the liquid has boiled if you slightly move the container or lower the spoon into it.

But you need to know that boiling in the microwave is dangerous. If the liquid is overheated, the dishes may break. In this case, the microwave oven will fail, and a person may get burned.

For proper boiling in the microwave, you should:

• filling a clean container with water more than half:
• by placing a wooden stick for sushi or a spoon (not metal!) in a glass;
• turn on the oven to the desired setting.

You should stop heating every minute, stirring with a spoon, then turn it on.

A glass for boiling in a microwave is chosen one that is made of glass or ceramic. It is best to take dishes for boiling water with cracks or chips inside. Bubbles will definitely appear when boiling in such a dish.

As soon as the water boils, which takes about 3 minutes, the stove is turned off and wait a minute. Only then they take out a glass of boiling water, after tapping it lightly on the sides with a wooden spoon. Excess gases will leave the liquid, and it will not spill out of the container.

In metal utensils, it is forbidden to cook in a microwave oven, as the device will cease to function.

It is recommended not to omit the tea bag when heating in the microwave. Tea bags often have metal clips that can cause sparks inside the appliance, causing it to turn off.

Take out the container with boiling water carefully, using an oven mitt or gloves. Do not bring a vessel close to the face, so as not to burn the skin

Boiling water for drinking is a must. But it is not necessary to repeat the process several times. It won't bring any health benefits.

You can boil water twice

However, all of the above is debatable.Many scientists prove that even boiled, though not boiled, water is water. And conjectures about the fact that water should be structured, and boiling destroys its structure, are just unfounded statements by representatives of pseudoscience, since there is no structured water, as well as its useful properties in science. Yes, in science there is such a term as "heavy water". Heavy water is water that contains deuterium.

However, scientists reassure: in the water that we have in the water supply, deuterium is in small quantities, and certainly cannot adversely affect human health. Another issue is that in connection with modern ecology and condition of water pipes, in water there is always a large amount of various impurities and heavy metals, and here, at least boil, at least not boil - there will be no difference.

Scientists who believe that you can boil water many, many times also refute the opinion that when you boil water twice, it loses oxygen. Nothing like this! There is exactly as much oxygen in boiling water as there is in water boiled several times. So, as you can see, there are many opinions about whether it is possible to boil water twice, as well as many adherents of one side or another.

We have looked at two sides of the same issue. It is up to you to decide whether to boil water twice or not, as this is your health and your body. There is no single answer, and the evidence for both sides seems very convincing.But, nevertheless, it is better to heed the advice and reduce the use of boiled oxen to a minimum, replacing it with pure purified or mineral water. Be healthy!

Alternative solution: do not boil

Actually, we boil out of habit: before, kettles could only bring the water temperature to 100 ° C and turn off. But today, many models are adjustable. For example, green tea is advised to be brewed at a temperature of 70-80 ° C, that is, once boiled water is enough to simply heat it up. There is an adjustment, for example, for this Bosch:

Another option is to use thermal pots. These are thermoses that can boil water. If you have a large family and everyone drinks hot drinks at different times, a thermopot will really come in handy. The water will stay hot all day and you won't have to boil it again. You can take, for example, such a cute Xiaomi with the ability to smartphone control. 

If you are all- I still want a teapot, look at what unusual models we have collected in our selection. And since we are talking about water, we are sharing advice on what kind of water to fill in the iron: plain, boiled or distilled.

Basic rules for boiling

In order for boiled water to retain its beneficial properties, it must be properly prepared. Many are interested in whether it is possible to boil water several times. For proper water, there is a rule: it should be consumed no later than 6 hours after preparation. Boiling the water again will kill all the beneficial properties.

Water does not boil very quickly in a kettle or saucepan. If you need to speed up the process, it is better to boil water in the microwave.

But not every container is suitable for boiling. For example, is it possible to boil water in a galvanized bucket or pan.Definitely not, because when heated, zinc is released and combines with water. And zinc poisoning is very difficult to tolerate by humans. For boiling, use specially designed containers.

And what to do if you accidentally bought soda, is it possible to boil soda water, and is it harmful. It is possible: it is only better to let the gases escape before boiling.

Of course, you can’t get poisoned with such water!

Yes, this is understandable to everyone (unless you poured it from a puddle!), But why load your body with unnecessary “chemistry”, which is actively recruited in long-standing water? Agree, it is much better to accustom yourself to pour out the “old” water from the kettle, not to boil it even the 2nd time (not to mention the 3rd!), and pour fresh water all the time.

How to boil water correctly and whether it is worth doing it several times, you will be told in this video. We look.

It's interesting: why don't flush condoms down the toilet — objective reasons and superstitions

Don't boil - freeze

If you are using boiling as a cleaning method, then it is better to look for a more effective method. The Internet is filled with articles that advise cleaning liquids by freezing.

And this option is suitable, even if you take chlorinated tap water. The most interesting thing is that this is not a myth, freezing really allows you to get rid of harmful impurities.

After the water turns into ice, a small amount of liquid will remain at the bottom of the container, which must be drained. According to experts, this is light water, poorly absorbed by the body. Defrost ice and drink cool water with pleasure. A great option for storing bottled liquids.

In conclusion, we recall that many diseases begin due to a lack of fluid in the body or its low quality. Remember that clean water without impurities is the basis of a long life of a person and his good health.

Why you can't boil water twice is a scientific fact

The main purpose of boiling water is to destroy harmful and pathogenic microorganisms, which die when the temperature rises. liquids.

• The fact is that when water is purified for the second time, the destruction of organic matter, that is, pathogenic bacteria, does not occur. It dies or decomposes for the first time. Water vapor is intensively released due to the evaporation of water, due to which the concentration of the mineral component increases - the solution becomes more concentrated, and, therefore, can cause more harm to health.
• In addition to minerals, salts, alkaline and acid radicals, water contains dissolved hydrogen and oxygen atoms. In the process of intensive evaporation of water vapor, atomic hydrogen, including deuterium and tritium isotopes present in scanty amounts, settle to the bottom, increasing the density of the liquid.

During repeated or prolonged boiling, the active chlorine contained in the water reacts with the remains of organic substances and mineral dissolved substances. What might result from such a reaction is difficult to predict. Here much depends on the degree of water purification at water intake stations, where there is a system of deep purification (filtration) and subsequent chlorination. However, both physics and chemistry teach us that to speed up any reaction, the initial ingredients must be heated.Therefore, repeated boiling of water leads to an increase in the variants of chemical reactions, which may result in the appearance of various kinds of carcinogenic substances and dioxins.

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 value of the dipole moment changes. To restore the original properties, some healers recommend freezing distilled water, which has a high degree of purification and, from the point of view of chemistry, is absolutely harmless to humans. For drinking and cooking, it is recommended to use melted liquid.

At one time, the television charlatan Alan Vladimirovich Chumak restored the quality of water, who cleaned and charged the water in front of the viewers, without leaving the Ostankino studio. According to him, neither single nor double boiling was required after that. So why you can not boil water twice - the scientific fact explains quite clearly.

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