0
0
0
s2sdefault

They work by heating up a liquid [...]

Users inhale the vapour produced, which contains nicotine - the addictive element in cigarettes.

But nicotine is relatively harmless compared with the many poisonous chemicals contained in tobacco smoke, such as tar and carbon monoxide.

Nicotine does not cause cancer - unlike tobacco in normal cigarettes, which kills thousands of smokers every year.

That's why nicotine replacement therapy has been used for many years by the NHS to help people stop smoking, in the form of gum, skin patches and sprays.