When heated to the max and inhaled deeply, e-cigarettes produce the toxic chemical formaldehyde, which could make the devices up to 15 times more cancerous than regular cigarettes, US researchers said Wednesday. While some say e-cigarettes may help tobacco smokers kick the habit, others are concerned that the unregulated devices are being marketed widely despite little long-term evidence about their health effects. The team from Portland State University experimented with a machine that "inhaled" e-cigarette vapor at low voltage and high voltage to see if and how much formaldehyde was produced by the heating of the vaping liquid, which contains flavoring chemicals, nicotine, propylene glycol and glycerol. No formaldehyde was detected when the machine operated at the low, 3.3 voltage setting, the authors said in a research letter published by the New England journal of Medicine.
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