Evidence reviewed by Public Health England and reaffirmed in the 2022 Office for Health Improvement and Disparities evidence update concluded that nicotine vaping products are likely to pose only a small fraction of the risks of smoking and to be at least 95% less harmful than combustible cigarettes.

Although research into their long-term health effects continues, people who switch completely from combustible cigarettes to vaping are likely to substantially reduce their exposure to the toxic substances responsible for most smoking-related disease.

For a detailed review of the evidence, see: