Electronic cigarette

Components and Types of Electronic Cigarettes

  • An electronic cigarette consists of an atomizer, a power source such as a battery, and a container for e-liquid.
  • E-cigarettes have evolved over time and are classified into generations.
  • First-generation e-cigarettes resemble traditional cigarettes and are called cigalikes.
  • Second-generation devices are larger and less like traditional cigarettes.
  • Third-generation devices include mechanical mods and variable voltage devices.


  • The mixture used in e-cigarettes is called e-liquid.
  • E-liquid formulations vary widely.
  • A typical e-liquid is composed of propylene glycol and glycerin (95%) and flavorings, nicotine, and other additives (5%).
  • The flavorings can be natural, artificial, or organic.
  • Over 80 harmful chemicals have been found in e-liquids, including formaldehyde and metallic nanoparticles.

Use and Popularity

  • E-cigarette use has rapidly increased since entering the market in 2003.
  • In 2020, there were 68 million adult e-cigarette users globally, compared to 1.1 billion cigarette smokers.
  • E-cigarette use is highest in China, the US, and Europe.
  • Many users vape to quit smoking or as a recreational activity.
  • E-cigarettes are believed to be safer than smoking and offer a wide choice of flavors.
  • E-cigarette use has been attributed to targeted marketing, lower cost compared to cigarettes, and better safety profile.
  • The number of e-cigarette users increased to 82 million in 2021.
  • China has the highest number of e-cigarette users.
  • E-cigarette use is popular in the US and Europe.
  • E-cigarettes are used by people trying to quit smoking and those looking for alternatives to cigarettes.

Health Effects and Adverse Effects

  • The health risks of e-cigarettes are not known for certain, but the risk of serious adverse events is thought to be low.
  • E-cigarettes are likely safer than combusted tobacco products.
  • E-cigarette use is associated with increased risk of chronic obstructive pulmonary disease, asthma, chronic bronchitis, and emphysema.
  • Laboratory tests suggest that e-cigarettes are likely to be far less harmful than combustible tobacco cigarettes.
  • Common adverse effects of e-cigarettes include abdominal pain, headache, blurry vision, throat and mouth irritation, vomiting, nausea, and coughing.
  • Nicotine is addictive and harmful to fetuses, children, and young people.
  • An outbreak of severe vaping lung illness in the US was strongly linked to vitamin E acetate.
  • E-cigarettes produce similar levels of particulates to tobacco cigarettes.
  • Limited evidence shows adverse respiratory and cardiovascular effects in humans, calling for more long-term studies.

Smoking Cessation, Safety, and Controversies

  • Limited evidence suggests that e-cigarettes help people quit smoking in clinical settings.
  • Outside clinical settings, vaping does not greatly change the odds of quitting smoking.
  • E-cigarette use may decrease the number of cigarettes smoked.
  • There is no consensus on the risks of e-cigarette use.
  • There is little data about their safety, and a considerable variety of liquids are used as carriers.
  • Reviews of the safety of e-cigarettes have reached different conclusions.
  • Regulated US FDA products such as nicotine inhalers may be safer than e-cigarettes.
  • E-cigarettes are generally seen as safer than combusted tobacco products.
  • Evidence to substantiate the potential of vaping to lower tobacco-related death and disease is unknown.
  • The health benefits of reducing cigarette use while vaping is unclear.
  • E-cigarettes could have an influential role in tobacco harm reduction.
  • Tobacco harm reduction has been a controversial area of tobacco control.
  • Health advocates have been cautious about endorsing e-cigarettes as a harm reduction method.
  • The public health community remains divided on the safety and efficacy of e-cigarettes for smoking cessation.
  • Dual use of e-cigarettes and traditional cigarettes may increase the risk of addiction and hinder quitting.
  • The promotion of vaping as a harm reduction aid is considered premature.

Electronic cigarette Data Sources

Reference URL
Glossary https://www.alternix.com/blogs/glossary-of-terms/electronic-cigarette
Wikipedia http://en.wikipedia.org/wiki/Electronic_cigarette
Wikidata https://www.wikidata.org/wiki/Q189511
Knowledge Graph https://www.google.com/search?kgmid=/m/02vlckk