This study confirms that in the UK, despite substantial experimentation with e-cigarettes by youth, this experimentation does not appear to be leading to regular e-cigarette use by a large proportion of youth, and those who are regular users are overwhelmingly youth who are already smokers or who smoked in the past.

• We lied to you when we told you that electronic cigarettes may be "every bit as dangerous" as tobacco cigarettes.

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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