In recent years, with the popularity of e-cigarettes, some organizations have paid close attention and some questions have been raised about e-cigarettes. Some reports indicated that the e-liquid contains high carcinogens like formaldehyde. Even some news stated they have proven that the emission of formaldehyde from electronic cigarettes is 15 times higher than tobacco cigarette. But what is the truth? Is e-cigarette really as harmful as the news indicates, or even more harmful than tobacco cigarette? In fact, we can clearly see the form of the Environmental Health Prospect (EHP) magazine that e-cigarettes do contain formaldehyde, but they are much lower than cigarettes. Since we talked about chemical ingredients above, we can started with the main ingredients in tobacco cigarettes. In addition to nicotine, cigarettes also add a variety of chemicals, such as mold inhibitors, combustion improvers, preservatives, fragrances, etc. Therefore, there will be a series of substances such as acetone, aluminum, ammonia, arsenic and benzene. In the case of e-liquid, it contains nicotine salt, PG/VG, flavor and fragrance. Among them, the FDA's definition of PG is "common to human health"; VG is also known as vegetable glycerin, widely used in food and cosmetics. Fragrance is very common and has minimum effect on the human body. It it showed that in the composition of tobacco cigarettes and e-liquid, nicotine is the common ingredient, but the composition of tobacco cigarettes is significantly more complicated. So is nicotine the main cause to cancer? At least for now, the FDA has announced that "nicotine itself has no direct cause to cancer. Lung cancer, heart disease, etc. which kill millions of lives in the United States and around the world, are not directly related to nicotine. Nicotine is addictive, but it does not cause cancer. The real hazard comes from the many harmful compounds produced during the combustion process, mainly tar; The electronic cigarette is an atomization process heated by atomizer, which is a physical process. When the e-liquid is atomized, it does not generate other substances, and naturally no harm is generated. Some people will say, does heating process create a cracking reaction like a cigarette? The cracking reaction requires a temperature of about 1300 to 1500 ℉, while the mainstream e-cigarette device has a maximum temperature of 550 to 750 ℉. (Wismec's Reuleaux Tinker temperature range can be controlled at 100-600 ℉.) In general, no harmful substances will be generated. Therefore, in addition to nicotine, e-cigarettes are safe and not toxic. In contrast, tobacco cigarettes are complex in composition, and most substances are harmful to the human body, from the teeth to the internal organs to the nervous system, causing cancer. Is e-cigarette healthier than tobacco cigarettes? The answer is yes. This is not to promote vaping (including nicotine), but the role of e-cigarettes in smoking can not be ignored, more and more smokers are getting used to e-cigarettes, slowly walk away from traditional cigarettes, thereby reducing the damage to their bodies.