With the exception of aluminum, the concentrations of most metals were substantially lower during vaping than in the no vaping condition. Metals therefore do not appear to be a significant health issue at this point in time.

Last week, I revealed that Americans for Nonsmokers' Rights (ANR) is making on its web site about electronic cigarette companies, claiming that all of them are owned by Big Tobacco and that Mistic, in particular, is a tobacco-owned company that is distributing misinformation based on a Harris Interactive survey it commissioned.

The rest of the story is this study actually found no effect of electronic cigarette use on pulmonary function tests, indicating that there was no clinically significant observable effect of vaping on lung function. Specifically, the study found "no differences between basic pulmonary measurements" between the two groups, demonstrating that acute exposure to electronic cigarette vapor did not affect FEV1, FVC, PEF or MEF50 and MEF75."

It is easy to see why this methodology is inappropriate to assess smoking cessation rates among smokers who use e-cigarettes in an attempt to quit smoking.

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