Study have shown that certain electronic cigarettes at high temperature settings could potentially release more formaldehyde - a cancer-causing chemical - than smoking traditional cigarettes, new lab tests suggest.
'It's a potential red flag,' said one independent expert - Stephen Hecht, a chemist and tobacco researcher at the University of Minnesota - commenting on the study.
'Under some conditions, e-cigarettes might be generating more formaldehyde than you'd want to be exposed to. But I don't think we know enough yet.
'There's a huge variety in the makeup of these cigarettes and how they are used.'
The study was published as a letter in the New England Journal of Medicine. The journal said it had been reviewed by experts in the field.
Although the research does not prove a health risk because it involved limited testing on just one brand of e-cigarettes and was done in test tubes, not people.
It also does not mean e-cigarettes are better or worse than regular ones; tobacco smoke contains dozens of things that can cause cancer.
Credit: New England Journal of Medicine via UK Daily Mail
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