In particular, support came from smokers who stated that they were considering a quit attempt, and young smokers (although the evidence for these findings is less strong, due to the small number of people in that group)
Additionally, the inhalation of ultrafine particles and chemical irritants in e-cigarette aerosol can potentially harm the respiratory system
A mysterious vape lung illness called EVALI by the CDC was caused by vitamin E acetate in THC drug oils
But studies so far show that e-cigarettes aren't any better at helping you quit than other forms of nicotine replacement (like the patch or gum)
Environmental Pollution 198: 100107
External contractors paid by the sponsor provided monitoring, data handling, and all statistical analyses (i3 Research, i3 Statprobe)