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A similar story occurred with e-cigarettes, when Eissenberg and colleagues found that little nicotine is absorbed by vapers. Except that they didn't use vapers in the study, they used smokers, and they did a puff-for-puff comparison with cigarettes. As any vaper worth his or her salt knows, you don't vape like you smoke - so the study came back with results that are irrelevant to real-world use (although that doesn't mean it wasn't worth doing).

Now, however, we are a step closer to knowing exactly how much nicotine we do get from e-cigarettes. Dr. Konstantinos Farsalinos and colleagues have just published their in-depth study(full text) which analysed 45 experienced e-cigarette users and 35 smoking controls. They looked at several measures, including the puff duration and number of puffs taken over a given time-frame from users puffing on a eg0/tank setup. They found that, using the 9mg/ml liquid provided in the test, vapers were consuming around .5mg of nicotine in 5 minutes, and 1.6mg over 20 minutes.

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11y ago

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