E-cigarettes contain 10 times the level of cancer-causing agents as regular tobacco it has been revealed.
According to a report by DailyMail.co.uk health experts in Japan discovered high levels of chemicals including formaldehyde and acetaldehyde in the vapour produced by several types of e-cigarette liquid.
The latest findings will come as a blow to those in favour of the electronic devices, heralded as safer than regular cigarettes.
The devices, which are becoming increasingly popular around the world, particularly among young people, function by heating flavoured liquid, which often contains nicotine, into a vapour that is inhaled, much like traditional cigarettes but without the smoke.
Researchers commissioned by Japan's health ministry found carcinogens such as formaldehyde and acetaldehyde in their vapour. The World Health Organisation has called for e-cigarettes to be banned.
