First, he cites the JAMA Pediatrics article in which Glantz and Dutra conclude that electronic cigarettes are exaggerating, rather than ameliorating smoking among youth. Clive writes: "somehow you have managed to position this study as showing there is a gateway from e-cigarette use to smoking. NOTHING in the study or the underlying data suggests this. You would need information on how smoking, e-cigarette use and abstinence evolved over time to test these hypotheses, but your study does not have that."

5. The majority of dual users (e-cigarettes and cigarettes) are using e-cigarettes every day, and half are using at least two cartridges/disposables per day.

Lastly inhaling caffeine is not the best way to get caffeine into your bloodstream apparently. From this study , it seems caffeine is only 60% potent when inhaled versus ingested orally.

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