January 10, 2012   Researchers in Greece saw changes in the lung function of healthy smokers who puffed on an e-cigarette for just five minutes—although it’s not clear what the long-term result of those responses might be in regular e-cigarette users, the team reports in the journal Chest. “E-cigarettes” are battery-powered devices that allow users to inhale a vaporized liquid nicotine solution instead of tobacco smoke. They were designed as a way for smokers to get their nicotine fix without exposing themselves, or other people, to the toxins in tobacco smoke. But some scientists, including officials at the U.S. Food and Drug Administration (FDA), warn that too many questions remain about the safety of these products.

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