Relative risks of cancer posed by combustible and vapourising forms of nicotine delivery: evidence from chemical exposures
11:10 - 11:25
Safety and Health Effects
One of the few methods for comparing the risks of cancer from smoking with vaping uses the chemical composition of their aerosols and known cancer potencies of individual carcinogens along with estimates of the quantities of aerosol to which a smoker or vaper is exposed each day. This presentation uses published chemical data from a wide range of sources to map out the spectrum of cancer risks over the range of nicotine-bearing aerosols. Cigarettes and heat-not-burn tobacco products occupy well-defined regions of the risk spectrum, in contrast e-cigarette vapours are broadly distributed spanning the range from the very low risk of a medicinal nicotine inhaler to the very high risk of cigarette smoke. The available chemical evidence indicates that the risk of cancer from vaping e-cigarettes is generally low (<1% of tobacco smoke) but vaping at high atomiser powers can lead to higher risks associated with excessive carbonyl production. Further research into hardware technologies and liquid ingredients could lead to e-cigarette emissions of consistently low cancer risk.
- Dr Ed Stephens Senior Research Fellow - University of St Andrews
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