The most damaging revelation in the FDA's is the fact that the agency is not sure that smoking is any more hazardous than vaping.

Curiously, however, this knowledge doesn't stop Glantz from using these studies to draw a conclusion about the efficacy of e-cigarettes as smoking cessation aids in his review article. Moreover, his review article omits any mention of the fact that these 5 studies "did not measure whether people were using e-cigarettes as a smoking cessation aid" and that these studies "did not directly test the efficacy of e-cigarettes as smoking cessation aids."

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