In fact, in a by Flouris et al., the investigators found that real cigarettes, but not the fake ones, had a significant detrimental effect on pulmonary function, measured by spirometry. This study documents that while active smoking has immediate, clinically meaningful effects in reducing lung function, electronic cigarettes do not.

"There is no evidence, no convincing evidence that using e-cigarettes leads to people quitting, there's not even convincing evidence it leads to people smoking less, although that might be possible," he said.

To illustrate how inappropriate the use of these studies are to draw conclusions about the effectiveness of e-cigarettes for smoking cessation, let's look at two of these studies:

Glantz believes that informing consumers that e-cigarettes are safer than smoking will increase the appeal of e-cigarettes to youth, and on that basis, he wants the truth to be suppressed. The comment recommends that FDA ban "indirect health claims," which presumably means claims that e-cigarettes are safer than real cigarettes.

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