Amazing knowledge

Chapter 2 Health Microscope: The "unusual" knowledge of life that you don't know
*What the hell are acidic and alkaline constitutions?

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In recent years, the sayings about "acidic constitution" and "alkaline constitution" have sprung up in daily life, and some people even think that acidic constitution is not good, and acidic constitution is easy to get cancer.What the hell is this acidic body and alkaline body?

The saying of acidic physique and alkaline physique is actually derived from a certain research.According to research, only 10% of people have a healthy alkaline physique, and most of the remaining people have sub-healthy acidic constitutions, and those with acidic constitutions are more likely to suffer from diseases.This statement has some truth, but it is inevitably a bit exaggerated.

As we all know, there are various liquids in the human body, such as sweat, urine, digestive juice, tissue fluid, etc., and they all have their own pH. It's just the acidity. If the acidity of the stomach is used to define the acidity and alkalinity of the body, wouldn't everyone be in danger?In fact, the so-called "acidic constitution" and "alkaline constitution" are defined by the pH value of the blood.

Under normal circumstances, the pH of the blood is maintained between 7.35 and 7.45, which is weakly alkaline, which is the legendary healthy body.The regulation mechanism of the human body is strict beyond imagination, and the pH value of the blood will only fluctuate within the range of 0.1.No matter whether you drink a large bowl of vinegar or eat a large bowl of "alkaline food", the pH value of the blood will not change sharply. After all, there are layers of checks by the digestive system, endocrine system and respiratory system .

At present, there is no way to clearly define acidic constitution and alkaline constitution. If it is really acidic constitution (pH<7.35) or alkaline constitution (pH>7.45), the first thing to do is to find a doctor immediately.

The final word: The structure of the human body is very complex, and the pH balance is also maintained under a very strict regulatory mechanism. If there is an obvious acid-base constitution, it is very likely to be acidosis or alkalosis, which needs to be treated, but there is currently no Any research clearly shows that the acidity and alkalinity of the constitution are related to the incidence of cancer.

* Anti-Dandruff Shampoo Causes Cancer, Is It True?
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Shampoo is an essential daily necessities in our home, but a news that "anti-dandruff shampoo can cause cancer" made everyone feel at a loss.Does anti-dandruff shampoo, which is closely related to our life, have anything to do with cancer?
With the exposure of "dioxane", the claim that anti-dandruff shampoos cause cancer has also been widely spread in the society. Many people regard dioxane as a scourge, and feel that as long as they are exposed to this chemical substance, they must be related to cancer. There are relationships.

In fact, not only anti-dandruff shampoos, but also many cosmetics contain dioxane, because the main uses of dioxane are emulsifiers, detergents and solvents.

Dioxane is an organic compound that is a colorless liquid with a mild odor.Dioxane is slightly toxic. If the eyes, respiratory tract and skin are in direct contact with dioxane, there will be irritation.

Moreover, dioxane can cause a certain degree of damage to the liver, kidneys, and nervous system of the human body. If it is acute dioxane poisoning, it may even endanger life safety. Dioxane is indeed a carcinogen. Look at it this way Come on, dioxane is really not a good thing.

But this dioxane is very active, whether it is air, water or our common vegetables, it may be mixed with dioxane, and shampoos are generally made from natural products, so dioxane is often used as an impurity that is difficult to remove present in shampoo.But its tiny content is not enough to cause cancer, and the content of dioxane in the air is much higher than it.

However, when you choose anti-dandruff shampoo, you still have to keep your eyes open and recognize the ingredients in the shampoo.Although substances such as selenium disulfide and ketoconazole can effectively remove dandruff, if the proportion is not well controlled, they will also bring great harm to the human body.

The final word: Everything has two sides. Although dioxane is carcinogenic, a slight dose is not harmful to the human body. The content of dioxane in shampoo is completely within the controllable range, as long as it meets the safety standards Shampoo basically has no possibility of carcinogenicity.

*Is "stool" really a health killer?

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"Stool" is very common in life, but many people think that "stool" is a health killer. Is this "stool" really so harmful?

In addition to saying that "stool" is a health killer, many people think that "if you don't eat breakfast in the morning, your intestines will absorb poop."These unbelievable claims emerge in endlessly, which is simply overwhelming.

"Su" means "overnight". As the name implies, "stool" is the feces accumulated in the body, and the only "temporary place" for feces in the human body is the colon.Some people think that if the feces stay in the body for a long time, it will oppress the villi of the small intestine and affect the normal absorption of nutrients by the human body, thus causing certain damage to the body.This statement is simply absurd. The only place where feces can stay is the colon, and the small intestine will not meet with feces. It is ridiculous to say that "stool" oppresses the small intestine.If the small intestine really meets the "stool", then it is not a "health killer" problem, but the health is "killed".

There is also a saying that over time, feces will ferment, producing a certain amount of toxic gas, leading to acidosis and affecting health.The most acidic part of the human body should be the stomach. The gastric acid secreted by the stomach is strongly acidic. Food from the stomach to the intestinal tract will inevitably carry some gastric acid. However, our intestinal tract and stomach can always coexist peacefully. It is because the small intestine itself is alkaline, and stomach acid will be neutralized when it comes here, so even if the "stool" produces acidic gas, it can't help the intestinal tract.

As for the long-term accumulation of "stool" in the body will affect the body, this is nonsense. What affects the body is the accumulation of fat, and feces really have no such ability.

The final word: the real health killers are only irregular work and rest and diet. Feces are just waste from the body's metabolism. Even if they stay in the body for a long time, they will not reach the level of "health killers".

* Can myopia and presbyopia cancel each other out?

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One of myopia and presbyopia is able to see clearly at near, and the other is able to see clearly at a distance. Some people think that if these two are in contact with each other, then both near and far can be seen clearly!
People who think that myopia and presbyopia can cancel each other out are definitely optimists, because the pessimists may think that these two are combined together, and when they are superimposed, it becomes impossible to see far and near!

In fact, presbyopia and myopia are pathologically different. One is that the ciliary muscle is old and inelastic; the other is refractive error.The reason why people often think that myopia can "offset" with presbyopia is mostly because compared with people with normal vision, myopic people are not sensitive to presbyopia, so they will develop it later than people with normal vision. Perceive the fact that I am old.

But this also depends on the person. Myopia within 300 degrees may not need to wear reading glasses, but if the degree of myopia is higher than 300, you still need a pair of reading glasses.To put it simply, myopia and presbyopia are not "plus or minus zero" as some people think, but the cruel "1+1=2".

And after getting older, the degree of presbyopia will gradually increase with age, so it is better for everyone to avoid long-term fatigue and use the eyes. After all, the eyes are the windows of the soul. If you really add double glazing, That's really uncomfortable, isn't it?

The final word: Myopia and presbyopia cannot cancel each other out. If the degree of myopia is high, you may need to wear special bifocal glasses.Presbyopia is a phenomenon that occurs during the natural aging process, and few people can avoid it, so it is better to take good care of your eyes now.

*Is it true that ripening bananas can make children mature prematurely?

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For a period of time, the banana market suffered from cold weather again and again. Many people believed that ripening bananas would have a very adverse effect on the growth of children and would make them precocious.is this real?

What can accelerate the ripening of bananas is actually a chemical agent called "ethephon", which is an organic compound and is an essential reagent for stimulating the growth of agricultural plants.

Ethephon is harmful to the human body, and the eyes and skin will be affected. Ethephon will cause nausea and burning sensation if swallowed by mistake.However, in practice, the amount of ethephon used for ripening is very small, and the ripening technology is very mature, so there is no food safety problem.Furthermore, ethephon is water-soluble, and a large part of ethephon can be removed by washing the fruit.

Ripening is a series of physiological and biochemical reactions. Under the stimulation of ethephon, plants accelerate their own production of ethylene, and the plant's endogenous ethylene accelerates its growth.

However, although ethephon can make plants mature early, it is only effective on plants.When it comes to the animal kingdom, ethephon does not have the slightest growth-accelerating effect.

Children's sexual maturity is regulated by sex hormones, and the brain releases gonadotropin-releasing hormone in a timely manner according to the growth status of children, which in turn leads to secondary sexual characteristics.And "precocious puberty" is to advance this process and let children start sexual development at the age of eight or nine. This is an abnormal development of the endocrine system, and ethephon cannot do this anyway.

The final word: Although ethephon is harmful to the human body, the content used in plant ripening is very small, and there is no food safety problem.Precocious puberty in children is a problem of the endocrine system, and the cause needs to be found from neuropathy or the endocrine system. Ethephon will not cause precocious puberty in children.

*Will it really be "one pregnancy and three years stupid"?

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There is a saying in China that "one pregnancy is stupid for three years". Once mothers-to-be are pregnant with a baby, their memory will decline, they will often forget things, and sometimes they will feel depressed for no reason. What is the situation?Will pregnancy really be "stupid three years"?

In fact, this not only exists in China, but also in foreign countries. It seems that mothers-to-be at home and abroad have reached a certain degree of unity on the matter of "pregnant stupid", and there are indeed some who have lost their IQs. Condition.

From a physiological point of view, after mothers-to-be have babies, the hormones in their bodies will undergo significant changes. The thyroid gland takes a back seat, and progesterone takes the lead.All kinds of estrogen and progesterone will be released in a large amount in a short period of time, and then return to normal after the pregnancy is over. The most direct impact of such ups and downs is emotional instability. One of the reasons for the self-extracting depression also provides relatively scientific medical evidence for the memory loss and IQ drop of mothers-to-be.

From a psychological point of view, mothers-to-be are pregnant with a new life, and the focus of their lives will undoubtedly be on the baby in their stomachs.Newborns do not have the ability to take care of themselves, and are almost completely dependent on the care of the mother in life. The mother's time is almost occupied by the baby, so it is necessary to pay attention to the baby's state at all times.As a result, a regular life schedule has almost become a luxury. Long-term lack of sleep and high mental stress will inevitably slow down their reactions.

The final word: New mothers are "pregnant stupid" not only because of sudden changes in their own hormone levels, but to a greater extent because the arrival of a new life takes up more time and energy for them. The duration of "pregnant stupidity" also varies from person to person. When new mothers gradually adapt to their new roles, "stupidity" will naturally become farther and farther away from them.

* Beer is the number one culprit for "beer bellies," is it true?
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After a person reaches middle age, his stature does not grow, but his beer belly gets bigger every year. Many people think that beer is to blame. Is this really the case?

It is said that the culprit of "beer belly" is beer. This is really wronging beer and making beer a scapegoat for no reason.

The official name of "beer belly" is "abdominal obesity". It is called "beer belly" just because many people who love to drink beer will have this symptom, but these fats are not caused by drinking beer, but by the accumulation of visceral fat. .Disorders of the endocrine system, irregular life and lack of exercise can all cause beer belly, but beer will not cause beer belly.

Although beer is called "liquid bread", in fact, the calories of beer are not high. A can of beer has about the same calories as an apple.One of the big reasons why many people who love beer have a "beer belly" is to eat food and drink.

Beer is delicious, but it would be boring without appetizers. Thinking about the side dishes of beer, even the goddess said that fried chicken and beer are indispensable in the first snow days.Barbecue and deep-fried food are often found wherever beer appears, and foodies love and hate these things.Their flavor is tantalizing, a feast for the palate, but their fat content is a let-down.

Delicious fried chicken is high in calories, what is the concept?After eating a fried chicken leg, even running for half an hour can't consume its calories.In terms of high calories, appetizers surpass beer too much. In the same amount, the calories of fried food are almost 10 times that of beer.It's no wonder that people who love beer often have a "beer belly". After all, drinking beer can't be done without appetizers.

The final word: If you want to get rid of the "beer belly", it is useless to stay away from beer. The important thing is to pay attention to the snacks. Refusing fried, high-salt, high-calorie foods such as fried and barbecued foods is the real feasible way.

*Acne on the left face is due to abnormal liver function, is it true?
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Acne has always been the number one enemy of girls. Some people can judge where something is wrong with the body based on the place where acne appears on the face. They say that acne on the left side of the face is abnormal liver function, and acne on the right side may indicate lung problems. Is the statement reliable?

First of all, the officially accepted statement is that acne is controlled by endocrine, and when endocrine is disordered, acne will appear uninvited.In fact, acne has basically no connection with organs such as the liver and lungs.

If the liver function is really abnormal, there are related symptoms, such as loss of appetite, no fried food, abnormal liver function may indeed cause skin problems, but the symptoms are that the skin becomes rougher and darker, but it does not Can cause breakouts.If the skin deteriorates inexplicably, you can consider the problem of liver function, but the problem of acne should not be blamed on the liver.

If you have acne on your face, the best way to prevent it is to pay attention to diet and rest, and avoid spicy and irritating food.The reason why these foods are called "stimulating foods" is because although they can satisfy the appetite for a while, they will bring greater stimulation to our digestive system, affect normal digestion and absorption, and destroy the original food. digestive system.

At the same time, keep your face clean and wash your face with water frequently.We run around with a face every day, and we don’t know how much bacteria and dust are on our faces. If these things are not cleaned out in time and stay in the pores, of course they will show up. Their expression is " Acne".

Another point is to relax your mind, don't be tensed all the time, release some pressure in life and work in time, and maintain a happy mood.Otherwise, there may be acne on the left side of the face now, and it will be troublesome when the acne takes over the whole face.

The final word: Once acne appears, it is mostly due to endocrine problems. Don't blindly look for various reasons. Maintaining good and healthy living habits is the only way to fight acne.

*The crescent moon on the nail is a barometer of health, is it true?
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Healthy people must have crescents on their hands. The more crescents, the healthier they are. At least 6 crescents are considered basic health. Crescents are a barometer of health. From this point of view, is your health up to standard?

The scientific name of the crescent is "half-moon marks" or "a half-moon". In fact, the formation of crescents is a very natural growth phenomenon.Our nails are originally created by methyl groups, which are like a large factory that continuously manufactures and transports keratin cells, which are the main components of nails.

The new keratinocytes are white and round, and as new keratinocytes continue to appear, the old keratinocytes will be squeezed to the ends or front of the nail, and finally go out of the nerve range of the methyl group.The squeezed keratin cells no longer appear white, but become translucent, so most of our nails look flesh pink.

However, the growth rate of the methyl group is unbalanced, the methyl group in the middle grows the fastest, and the growth rate on both sides is relatively slow.The keratinocytes in the middle part of the nail are replaced faster, and the number of new keratinocytes is more, so an arc-shaped junction line will be formed.

In fact, to put it bluntly, the crescent we are talking about is relatively new keratinocytes, which are nails that have not yet been keratinized.

The place where the crescent appears most often is the thumb. This is because the thumb is used most frequently and the nails grow faster, so the crescent is more obvious.

The number of crescents does not actually reflect any health problems, but the metabolism of each person's body is different, so the growth rate of nails is different.

However, if the crescent moon changes significantly in a short period of time, it is necessary to pay attention, because it is very likely that the thyroid gland, which controls the body's metabolism, has gone wrong, resulting in a sudden change in the growth rate of the nails.

The final word: The crescents on the nails are just a natural phenomenon of normal cell growth, and the number of crescents is also linked to the normal metabolism of the body. Only when the crescents change suddenly can there be problems with body functions.In other cases, the health level of the body cannot be judged by the number of crescents.

*Is the hair getting darker as you shave?
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I heard that hair is very arrogant. The more you shave it, the stronger it will grow, and it will become thicker and darker. Is this true?

If this is true, how many beautiful girls don’t need to go to great lengths to grow eyelashes and eyebrows to save their sparse hair. They just shave their eyebrows and eyelashes and wait for them to grow back!Hair loss patients don't have to worry anymore, they can simply shave it, and it will grow thicker and darker anyway!

But does anyone actually do it?Even if there is, it is only a very small part. People who have this idea have no common sense, and those who practice this idea are a bit ridiculous.

Because the thickness, thickness, and color of hair are determined by genes and hormones, it is not something you can solve with a couple of scissors!Hair growth is controlled by hair follicles, which are hidden in the dermis of the skin, and any superficial trimming will not affect them.

The reason why the illusion of "the more shaved the hair is, the darker it is" is that the newly grown hair has not been subjected to much friction, and the hair itself has very little wear and tear. If you look at your hair, you will find that the hair at the root is obviously thicker than the hair. The ends are much thicker.Besides, the same chopsticks, long chopsticks are much easier to break than short chopsticks, so it is natural for new short hairs to feel harder than before, which is actually a sensory illusion.

Bottom line: hair growth depends on the inside of the body, and shaving doesn't affect the shape of the hair.So girls who want to remove hair can let it go without worrying that they will become darker and darker.

*What is the correct way to pick your ears?
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Ear picking is almost common, but experts suggest that frequent ear picking may lead to cancer.So, what is the correct way to clean your ears?

If the ears are itchy, even if there is no ear pick around, any cotton swab, hair, matchstick or hairpin can be requisitioned temporarily and become a tool for us to dig out ears.After digging out our ears, we are comfortable for the time being, but we don't know that there is really no benefit in doing so.

We usually dig out the ear canal in the external auditory canal. The external auditory canal is actually very fragile. There is very little subcutaneous tissue here, and the blood circulation ability is relatively poor. In other words, it is very sensitive.If you often pick your ears, the skin of the ear canal will slowly desquamate when it is irritated, and more "earwax" will be produced, so it will inevitably itch in the ears, and then we will pick our ears more often , such a cycle, the skin in the ear canal will become eczema-like, although it will not affect hearing, but it will inevitably increase the risk of otitis media.

The scientific name of the earwax that we pull out when we dig out our ears is "cerumen". Cerumen is a mixture of ear canal secretions and exfoliated dander. They are actually the little guards of the ears.Cerumen is light yellow and sticky. It can stick to the dust or small flying insects that invade the ear canal from the outside, and play a role in protecting the ear canal.

Moreover, under normal circumstances, cerumen will gradually lose moisture after encountering the air and become dry crumb-like earwax, which will then be excreted from the body by itself with exercise, chewing or talking, and there is no need for us to dig our ears.There are also some stubborn cerumen hidden deep in the ear, but these cerumen are generally relatively large in size, and it may be risky to dig them out without authorization. It is the right choice to seek help from an ear doctor.

The final word: picking your ears is harmful. If your ears are itchy, rub them around with your hands.

*Is it true that bones turn black after arsenic poisoning?
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The story of Pan Jinlian and Ximen Qing in the four famous Chinese novels "Water Margin" is quite famous. In the story, Pan Jinlian and Ximen Qing teamed up to pour arsenic on Wu Dalang. I don't understand.However, after the person who was poisoned by arsenic died, would the bones really turn black?
Since ancient times, arsenic, like Hedinghong, has been a poison that people talk about.The main component of arsenic is AS2O3 (arsenic trioxide), which is highly toxic. As long as 0.005 grams of high-purity arsenic is taken, it will cause poisoning, causing convulsions, bleeding from the mouth and nose, vomiting and diarrhea, and other symptoms. 0.07 grams, it is very likely to die in a very short period of time.

However, are the bones of people poisoned by arsenic necessarily black?actually not.

Human bones are basically composed of calcium salts. No matter who you are, your bones should be light yellow-white.But the bones are exposed to the external environment for a long time, and they are very easy to be oxidized, which will make the bones appear black.Also, the degradation of organic matter can also change the color of the bone.

Moreover, if it is acute arsenic poisoning, the residual arsenic should mostly exist in the blood.If it is chronic arsenic poisoning, the arsenic will not remain in the bones, but distributed in the hair on the body surface.

Under normal circumstances, the color of the bones can only be used as the direction of the autopsy, not as the basis for the autopsy. After all, the Wu Dalang incident is a literary work, and the coincidence is too high to be universal.

The final word: there is no direct connection between arsenic poisoning and black bones. Now that medicine is highly developed, it is completely possible to scientifically and accurately detect the components of arsenic.

*Is it true that you will get sexually transmitted diseases when you use the public supplies in the hotel?
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Whether traveling or on a business trip, it is inevitable to stay in a hotel. Many people have doubts about the sanitation of the hotel. What's more, it is said that using the public supplies of the hotel will cause sexually transmitted diseases.is this real?

If the military barracks are iron-clad camps with flowing soldiers, then hotels are iron-clad rooms with flowing tourists.All kinds of people may have stayed in the same room one after another. If the hotel's cleaning work is not done properly, there is a high possibility that the body fluids of a passenger may remain on the public items in the room.If this person happens to be suffering from a venereal disease, wouldn't there be a risk of contracting a venereal disease if later people use these contaminated public goods?
The most important mode of transmission of STDs is still sexual contact, but STDs may also be transmitted through indirect contact such as sharing bathroom supplies.Therefore, if the hotel's public goods are not thoroughly disinfected, it is indeed possible to be infected with sexually transmitted diseases.

However, this possibility is very low.First of all, the conditions for pathogens to survive outside the body are very harsh. Take the most familiar AIDS as an example. The HIV virus, the pathogen of AIDS, can survive for up to 10 days, and this is when the ambient temperature is kept at 4°C.As long as the HIV virus is placed at 56°C for 10 minutes or at 70°C for 4 minutes, they no longer have the possibility of survival.And this temperature condition can be achieved by general hotel disinfection facilities.

The final word: As long as the immune system is normal and there is no trauma on the body, the probability of contracting sexually transmitted diseases in the hotel is very small.However, it is best to bring personal hygiene products with you when you sleep out. Good hygiene habits are the guarantee of your health.

* Musk can cause miscarriage in pregnant women, is it true?

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With the popularity of court costume dramas, words such as musk and saffron have also entered our lives and are well known by people.The nobles in the court often use these things to make their opponents have miscarriages. Does musk really have this effect?

Musk is actually the secretion of musk animals. Mature male musk animals secrete musk through their unique glands to attract the attention of the opposite sex, so as to achieve the purpose of mating, courtship and reproduction.

After the natural musk is dried, it is a very precious medicinal material, which can refresh the mind, activate blood and remove blood stasis.In ancient China and ancient India, people regarded musk as a panacea for all diseases.Later, musk gradually spread to Europe, and Europeans used musk as a spice.

One of the main ingredients in musk is muskone, which is extremely volatile, which is one of the reasons why musk smells so strong.For pregnant women, the smell of muskone is very irritating. If exposed to it for a long time, it may indeed stimulate the uterus, cause uterine contractions, and eventually lead to miscarriage.

However, only natural musk has such an effect, and the most common ones on the market today are artificial musk, because musk animals need to be killed first to collect musk, and the yield of musk is very low, so the price of real natural musk on the market is even More expensive than gold.

As early as 1906, humans successfully deciphered the molecular formula of muskone. Since then, the natural musk on the market has been replaced by artificial musk.In contrast, although artificial musk has certain effects on pregnant women, the effect is far less than that of natural musk, and accidental contact will not pose a threat to the baby's life safety.

However, if sensitive pregnant women are exposed to musk for a long time, there is also a risk of miscarriage.Therefore, pregnant women should try to avoid exposure to musk-containing perfume or musk ointment as much as possible.

The final word: the effect of musk to promote blood circulation and remove blood stasis will indeed cause pregnant women to miscarry, but nowadays such pure musk is rare, and it is replaced by artificial musk which is less effective. As long as it is not exposed to for a long time, the risk of miscarriage can basically be avoided.

*Is it true that diabetics can safely eat sugar-free food?
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In order to obtain a better taste, most foods have more or less added sugar, but this can harm diabetic patients.But fortunately, merchants have adapted to the market trend and launched a lot of "sugar-free foods". Even so, can diabetic patients really eat with an open stomach?

The most obvious symptom of diabetes is that blood sugar levels are too high, and they cannot produce enough insulin, the only hormone in our body that can lower blood sugar levels.

If there is not enough insulin and the blood sugar concentration remains high, a series of complications will occur, which will seriously damage major organs and cause chronic damage to blood vessels and nerves.Therefore, diabetics should always control their blood sugar levels. Since they cannot lower their blood sugar levels, they can only reduce their sugar intake to fundamentally lower their blood sugar levels.

The "sugar-free foods" on the market just meet the needs of diabetics, but are these foods really "sugar-free"?

In fact, this is a conceptual misunderstanding. According to international regulations, sugar-free food refers to sweets that do not contain sucrose or starch sugar, but without these two sugars, other sugars still need to be added to the food to increase the sweetness. .These sugars are low in calories and don't even produce any calories, which is a boon for weight loss enthusiasts, but for diabetics, they are real sugar-coated cannonballs.Although it is labeled as "sugar-free food", it will also cause blood sugar concentrations to soar.

Therefore, when buying food, diabetics should not be misled by the slogans of the merchants. They must carefully read the ingredient list, carefully identify the sweeteners in the food, and be careful not to fall into the "trap" by mistake.

The final word: "sugar-free foods" are not [-]% sugar-free, they may only contain sucrose. Diabetics should keep their eyes open and carefully screen them, and don't just relax and eat them when they see "sugar-free". After all, the body is their own.

*Secondhand smoke is more harmful than firsthand smoke, is it true?
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We all know that smoking is harmful to health, even the words are printed on cigarette boxes.But there is news that the danger of second-hand smoke is greater than that of first-hand smoke. What should non-smokers do?
This news actually originated from a foreign study. In the study, the fathers in a group of families often smoked, but the wives did not smoke. Finally, it was found that the wives who often smoked secondhand smoke were three times more likely to develop lung cancer than their husbands. !
Internationally, the smoke produced by cigarettes is divided into two types: one is the smoke inhaled into the lungs by the human body through the cigarette filter, which is called "mainstream smoke"; the other is the smoke produced by smoldering tobacco, which is called "tributary smoke". Smoke", also known as "second-hand smoke".

Studies have shown that at the same concentration, sidestream smoke is more harmful, because sidestream smoke burns at a lower temperature than mainstream smoke, and incomplete combustion produces more carcinogens, so "second-hand smoke" is indeed more harmful .

However, in general, the concentration of second-hand smoke is much lower than that of mainstream smoke, especially around non-smokers. The concentration of second-hand smoke is far lower than that of smokers.

Compared with non-smokers, smokers not only have to bear the harm of mainstream smoke brought by smoking, but also the second-hand smoke around them will also bring them secondary harm, so there are more than 500 people every year. Millions of people died from smoking.

However, some people who work in public places may be exposed to second-hand smoke for a long time every day. They passively inhale second-hand smoke every day, and the damage they suffer may indeed be greater than that of ordinary smokers. The biggest reason to stay smoke-free.

The final word: the smoke produced by smoking contains at least 60 kinds of carcinogens. It may only take a few minutes to smoke a cigarette, but it may take several days for the second-hand smoke brought by a cigarette to dissipate.Secondhand smoke can cause many diseases, so whether it is for your own health or the health of those around you, quitting smoking is the right choice.

*Does eating microwaved food cause cancer?
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Knowledge: ★★★

Interesting: ★★
Microwave ovens have become one of the necessary household appliances at home. They are small in size and high in work efficiency. We only need to wait a few minutes to eat hot food, but some people say that things heated in microwave ovens are not edible. Yes, because they cause cancer!
It is indeed true that food will produce carcinogens after heating, but this "heating" also has a certain range. Carbohydrates and amino acids will only undergo chemical reactions when the temperature reaches above 120°C to produce some carcinogens.And protein will produce carcinogens only when the temperature reaches above 200°C, and microwave heating food is far from reaching this temperature.

Microwaves heat food by speeding up the movement of water molecules in the food to increase the temperature of the food. The more violent the molecules move, the more heat they generate.The boiling point of water is 100°C, and the final temperature of food heated by a microwave oven will not exceed 100°C, so there is no risk of carcinogens being produced by heating.

Microwave ovens heat food through microwaves. Microwaves are also a kind of radiation. It is understandable that people associate it with "carcinogenic", but in fact microwaves are essentially the same as infrared and visible light. No potential risk of cancer.

On the contrary, our traditional cooking methods have the risk of carcinogenicity, because in the traditional frying and grilling cooking process, the meat is easily burnt, which will produce real carcinogens, and microwave ovens can avoid this to a certain extent. occurrence of such a situation.

The final word: The microwave oven is a product of the progress of the times. It is simple and convenient to operate and brings great convenience to our lives. The saying that the microwave oven "causes cancer" is all rumors. Although the food heated by the microwave oven is slightly inferior in taste, but In terms of efficiency, microwave ovens are definitely the first choice.

(End of this chapter)