'Mind if I vape?"
A woman smokes an electronic cigarette which is being marketed as a healthy alternative to smoking because it does not burn tobacco. Instead, users inhale vapourised nicotine concentrate. Critics warn that the effects of the electronic cigarette might be underestimated. EPA/MARCUS BRANDT
The question may become more common as electronic cigarettes become more popular. The answer, however, remains elusive. Etiquette aside, the health effects of inhaling nicotine vapour (hence the term) are largely unknown. More research is clearly needed, but in the meantime, the US Food and Drug Administration (FDA) has to start regulating e-cigarettes.
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