What is the principle of electronic cigarette? And is that thing really harmless to the body?

Electronic cigarette is a kind of non-combustible electronic cigarette. Its efficacy is similar to that of ordinary cigarettes, which can refresh the mind, satisfy the craving, make smokers feel happy and relaxed, and at the same time have the function of quitting smoking. The essential difference between "electronic cigarette" and ordinary cigarette is: 1, which contains no tar harmful to human body and no carcinogen; 2, it does not burn, and does not produce harmful chemicals after burning; 3. There is no harm to others and environmental pollution caused by "second-hand smoke"; 4, no fire hazard, can be used in places where smoking and fire are prohibited. It consists of a shell, a cigarette holder, a dust filter, a spice box, a music mechanism, a light emitting diode, a power supply and a cigarette cap. When smoking a cigarette, negative pressure is generated in the cigarette, the spice box cover is opened, the outside air enters the cigarette and is sucked as the carrier gas of fragrance, the spice box cover is opened and connected with the power supply, the music institution plays music, and the light-emitting diode flashes accordingly. This kind of cigarette has many functions such as fragrance, sound and light, and is non-toxic, non-combustible and pollution-free. It is a good cigarette substitute and can also be used as respiratory medicine supply equipment, entertainment products and handicrafts. At present, e-cigarette sellers in China have a headache: in Canada and Australia, e-cigarettes are not allowed to go on the market because they contain nicotine, and the US Food and Drug Administration (FDA) also admits that they are drug delivery devices. Last Thursday, The Wall Street Journal reported that since 2008, the FDA has detained more than 700 batches of imported e-cigarettes and asked dealers to provide clinical evidence that e-cigarettes can help quit smoking. However, the dealer changed his mind and said that e-cigarettes are not used to quit smoking, but a pastime instead of cigarettes. In Elmhirst, Illinois, petite Victoria Bascoseros, an online retailer from suburban Chicago, is engaged in a struggle for regulatory rights. This struggle may affect millions of American smokers. Ms. Bascoseros imported e-cigarettes from China manufacturers and sold them on the website. She has 65,438+04,000 customers. This 48-year-old lady is undoubtedly a powerful promoter of the growing influence of e-cigarettes, and now she has to face the FDA. FDA believes that electronic cigarettes, a new nicotine product, are also addictive and may bring health risks, so clinical tests are needed before entering the market. Two years ago, FDA began to detain e-cigarettes imported from China. E-cigarettes are also called "atomized e-cigarettes". Its working principle is that the nicotine solution (extracted by the manufacturer) in the matched cigarette core (also called cigarette bomb) enters the atomizer after being pressurized by an ultramicro pump, and then is atomized into droplets by ultrasonic high pressure and inhaled into the lungs for absorption. The components of cigarette bombs are water, propylene glycol (or glycerol), spices and liquid nicotine, of which propylene glycol accounts for more than 60%, and its function is to produce the effect of smoking. In addition, there are nicotine and flavors such as coffee and strawberry. Nicotine is the main addictive component in tobacco products. Intake of high doses can lead to poisoning. It is generally believed that nicotine will not cause cancer, but it may cause high blood pressure. In electronic cigarettes, the content of nicotine can be increased or decreased according to the preferences of different consumers, and some electronic cigarettes even contain no nicotine at all. When smoking e-cigarettes, the solution in the smoke bomb is heated and atomized, and the smoke released is propylene glycol and water vapor, while nicotine is inhaled into the lungs. Some scientists believe that e-cigarettes avoid the burning process of tobacco, so the harm may be much less than that of ordinary cigarettes, because cancer and diseases caused by smoking are mainly caused by toxins produced in the burning process of tobacco. However, there is no published peer review result about whether e-cigarettes will cause long-term potential health risks. Some scientists worry that long-term exposure to propylene glycol gasification environment will also cause harm to human body. Propylene glycol is an additive approved by FDA for making salad dressing, cake powder and soda water, and also a raw material for cigarette production. "There are many reasons to believe that e-cigarettes are logically a safe design, but I hope to have experimental data to prove this safety." Thomas Eisenberg, a professor of psychology in virginia commonwealth university, said. He is studying nicotine addiction. In a report published last year, the FDA said that it conducted a preliminary review of some e-cigarettes and found that the quality control of such products was very poor. Some electronic cigarettes are labeled nicotine-free, but they are not. In addition, it was found that there was a trace of diethylene glycol in 18 sample. This is a chemical used to produce antifreeze, which will cause cancer after ingestion. The FDA said in the report that diethylene glycol replaced propylene glycol by bad manufacturers in order to reduce the cost of cigarettes and bombs. The spice added in the cigarette bomb may induce those teenagers who don't smoke to try smoking.