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.

The reference which supports this assertion is a by Dutra and Glantz which purports to provide data showing that electronic cigarettes are "aggravating the tobacco epidemic among youth."

Ironically, Stan Glantz criticized the study specifically because it examined the effect of electronic cigarettes on quitting among smokers who desired to quit. According to an in the New York Times: "Stanton A. Glantz, a professor of medicine at the University of California, San Francisco, said the study’s limitation was that it tried to measure the effect of e-cigarette use only among smokers who were trying hard to quit, not all smokers."

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