E-cigs have ‘10 times more carcinogens'

The electronic devices ­– 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 vapour produced by several types of e-cigarette liquid, a health ministry official told AFP.

Formaldehyde – a substance found in building materials and embalming fluids – was present at much higher levels than carcinogens found in the

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