Unfortunately, people can't overcome bad habits, can't be tempted by nicotine, and can't be satisfied with that false feeling. In fact, it is harmful and useless.
Effect of tobacco on brain: Nicotine spreads to the whole body through lung mucosa and oral mucosa. After nicotine enters the brain, it can imitate the central neurotransmitter acetylcholine and combine with nicotine receptors on the surface of many neurons. Nicotine can stimulate the central nervous system, especially in the reward circuit. It can release more dopamine by activating related nerves. The harmine and norepinephrine contained in tobacco can keep dopamine, serotonin and norepinephrine in synapses at a high concentration by decomposing the activity of enzymes. With the strengthening of dopamine, serotonin and norepinephrine, people will be more awake and more focused, thus alleviating anxiety and enduring hunger. Tobacco can cause nausea, dizziness and headache.
Tolerance and dependence: Regular smoking can keep the nicotine content in the brain at a high level. Neuron receptors are less and less sensitive to nicotine, and their stimulating effect on dopamine release is also weakened. The original cigarette consumption can no longer satisfy the pleasure of smokers, and smokers are tolerant of nicotine. When smokers stop smoking for a few hours (sleep time), the nicotine content in the body drops and the neuron receptors become extremely sensitive. At this time, the activity of acetylcholine exceeds the normal level, which makes smokers fidgety and want to smoke. At this time, if you can smoke a cigarette, you can over-stimulate neuronal receptors and promote the release of dopamine in large quantities. Through this phenomenon, we can understand why the first cigarette every day can bring great pleasure to "old smokers", and smokers are therefore caught in a vicious circle of more and more addiction.
The first ambassador who used tobacco as medicine-1560 When tobacco was not popular, Jean Nico, the French ambassador to Portugal, sent tobacco back to China as a medicine for treating many diseases. Hundreds of years later, chemists finally revealed that the misused drug in tobacco was harmful and named it nicotine.
The first article pointing out that tobacco is harmful-1924 The American Reader's Digest published an article entitled "Is tobacco harmful to human health?
The first doctor to write about the carcinogenicity of smoking-1927 British doctor F. E. Thulden wrote in the medical journal Scalpel that every lung cancer patient he saw or heard smoked.
The first person to suggest that passive smoking is harmful-1986 Lucy everett Cooper, an American health official, pointed out that non-smokers living in smoke face serious health risks.
For centuries, under the influence of "smoke culture" and with the development of modern civilization, "smoke" seems to be one of the symbols of men's charm. With the advancement of industrial civilization, the pressure of material civilization is increasing. Many women are also eager to "smoke". People seem to find a little relief in "smoke" When they realize that "smoke" is very harmful, they also know that it is devouring our health step by step, but they can't get rid of its temptation. The number of smokers in China is 350 million, ranking first in the world.
At present, the endless stream of smoking cessation products on the market can never really solve the problem of smoking cessation, and people always quit smoking and relapse. There are more than 2540 kinds of components in cigarettes, and complex physical and chemical changes will occur after burning. There are more than 400 kinds of carcinogens, among which 10 can promote the development of cancer, among which nicotine, tar, carbon monoxide, cyanide and radioactive substances are the most harmful to human body.
Cigarettes can also have a great influence on children.
As long as you have a hobby of smoking, you are one of the 654.38+03 billion smokers in the world, whether you are a general T or a civilian, a noble or a civilian, a general J or an S soldier.
When we are smoking and enjoying ourselves, do you know whether the way you smoke is right or wrong?
China is a big producer of flue-cured tobacco, and 80% of smokers smoke flue-cured tobacco. Compared with blended cigarettes, flue-cured cigarettes have higher tar content and more harmful substances. Especially some high-grade flue-cured cigarettes have higher tar content and greater toxicity than ordinary flue-cured cigarettes.
Many smokers have a habit of picking up a cigarette and observing the color of cut tobacco to see if it is golden yellow, so as to judge the quality of cigarette products. In fact, the color of cut tobacco has little to do with the intrinsic quality of cigarettes. On the contrary, the color of cut tobacco is directly related to tar content and toxicity.
Generally speaking:
▲ The color of cut tobacco tends to yellow, and the tar and harmful substances produced by cigarette burning increase;
▲ The color of cut tobacco tends to be dark brown, and the tar and harmful substances produced by cigarette burning are also less;
▲ Therefore, it is not the color of cut tobacco that determines the quality and aroma of tobacco, but its color and oil content.
In our daily life and work, do we often hear or meet such wives and friends who are worried about the health of smokers' husbands or relatives and friends and advise them: "Smoke less! Buy some good cigarettes if you want to smoke, so that high-grade flue-cured tobacco sells well every holiday. Friends who buy cigarettes as gifts prefer high-priced flue-cured tobacco. They regard cigarettes as other consumer goods. Cheap goods are not good, and good goods are not cheap.
Tobacco is a special kind of consumer goods! What is good smoke? What is expensive is good smoke! No! The value and price of cigarettes in China cigarette consumption market are seriously deviated! Most high-priced cigarettes are flue-cured tobacco. The high-end ones cost more than 10,000 yuan, and the low-end ones cost several hundred times! But as far as health is concerned, more than 10 thousand cigarettes are not as good as a few dollars, and the ph value of leaf cigarettes smoked by farmers is the same as human blood, which tastes great!
Now, many smokers begin to pay attention to smoking and health. Recently, many smokers regard smoking low-tar cigarettes as a fashion, but they only pay attention to the tar content in cigarette packages, and the smoking style has not changed.
Tar content in flue gas is a dynamic variable, which is closely related to raw materials, processing methods, storage conditions and smoking methods of cigarette products. Too much moisture in cigarette products, too hard rolling and low filter quality will increase the tar content of smoke during smoking.
The tar content of the same cigarette varies greatly under different conditions; Different smoking depth and number of inhalers, the increase or decrease of moisture in cigarette products due to improper storage, the change of natural environment, the physical condition of smokers and other factors will directly affect the tar content. Without changing the way cigarettes are smoked, it is really deceiving yourself just by observing the label of tar content on the packaging of cigarette products!
So far, no one who grows, produces, sells, smokes, talks about and opposes cigarettes can explain cigarettes clearly! Tobacco consumers also have the right to know! But they don't know that the international management of all kinds of tobacco products belongs to the food category, but cigarette packaging is different from food packaging. Various chemical additives, such as preservatives and combustion improvers, added in cigarette production are not marked on the packaging, let alone the product instructions and the like. Smokers can only "burn" tobacco without knowing why, so ignorance is the biggest harm of smoking! It is also the fundamental reason why smoking is harmful to health!
In fact, until today, people's understanding and concept of smoking have not changed, and people's criterion for smoking is whether you smoke or not. Teaching people to smoke sounds strange. If you need to study and train as a smoker before going to work, I believe no one will learn to smoke again. Because smoking does not need study and training, smoking will endanger health and even life! Learning a little tobacco knowledge will help you acquire a healthy and scientific smoking method, and you will know more about its "burning".
The influence of editing this paragraph on health Among all kinds of preventable causes of death, smoking accounts for the largest part. Smoking greatly increases the chance of lung cancer, which is the most difficult cancer with the highest mortality. Smoking causes 80% to 90% of lung cancer and 30% of cancer deaths. Other lung diseases such as emphysema are also related to smoking. Smoking will increase the risk of heart disease. Smoking during pregnancy will increase the possibility of miscarriage and underweight babies. Smokers look older than non-smokers because cigarettes increase skin wrinkles. At the same time, because smoking will speed up metabolism, smokers will lose weight.
Nicotine is the main effective component in cigarettes, which can stimulate the human body and make people addicted. Nicotine will reduce appetite. One third of smokers will gain weight after quitting smoking.
The probability of smoking causing lung cancer depends on the method and frequency of smoking and the type of cigarettes. According to statistics, the probability of an ordinary smoker suffering from lung cancer is 1 1 to 17%, which is 20 times higher than that of non-smokers. Gases entering the body during smoking are toxic and carcinogenic, including radioactive radon and radium -226. At present, most of the land used to grow tobacco in the United States has been polluted by long-term use of phosphate fertilizer. According to some studies conducted in the United States in the 1980s, it is suspected that radiation is the main cause of lung cancer caused by smoking, not tar in smoke. The bones of smokers contain lead -2 10 and polonium -2 10, both of which are products of radium decay.
Over the years, the tobacco industry has published many research results on addiction and diseases. Afterwards, it was found that the research methods sponsored by some tobacco companies were not rigorous, and there were preset tendencies and deviations in the results. On the other hand, some studies on secondhand smoke also have some defects such as sample selection deviation and insufficient data.
In any case, many countries and regions in the world have banned smoking in public places. In the United States, many local governments prohibit smoking in public places, including all offices and even on the streets. Smoking in restaurants and bars has been completely banned in more and more places in the United States. Many developed countries have enacted laws to prohibit cigarette advertising, and tobacco companies have restrictions on sponsoring sports activities; It is mandatory to add warning words on cigarette packages to remind buyers of the possible health effects of cigarettes. Most local governments also prohibit the sale of cigarettes to underage teenagers.
In Taiwan Province Province, in addition to banning smoking in public places and selling cigarettes to underage teenagers, in 2006, tobacco health and welfare donations were collected to reduce the number of smokers. In China, during the SARS legislation in April, 2000, the authorities stopped selling advertisements in the pyramid of tobacco products in car bodies, airports, buses, ferries and railway stations to safeguard public interests.