- A 2018 report by the National Academies of Science, Engineering, and Medicine (NASEM) concluded there is substantial evidence e-cigarette use increases the risk of ever using conventional cigarettes among youth and young adults.
The NASEM report also found:
- Moderate evidence that more frequent use of e-cigarettes is associated with an increased likelihood of cessation of conventional cigarettes
- Limited evidence that e-cigarettes may be effective aids to promote smoking cessation
- Conclusive evidence that e-cigarette use increases airborne concentrations of particulate matter and nicotine in indoor environments compared with background levels
- Conclusive evidence that most e-cigarette products, in addition to nicotine, contain and emit numerous potentially toxic substances
- Evidence on short-term exposure to e-cigarettes and health effects exists but is not conclusive