Disposable

Sadly, the agency concluded that it is not sure that e-cigarettes are any safer than tobacco cigarettes. The FDA states: "Many consumers believe that e-cigarettes are "safe" tobacco products or are "safer" than cigarettes. FDA has not made such a determination and conclusive research is not available."

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.

2. Feeling sad

Nevertheless, this does not stop the authors from drawing a conclusion. They conclude, despite their acknowledged inability to draw such a conclusion, that: "e-cigarette use is aggravating rather than ameliorating the tobacco epidemic among youths."

"In terms of acute effects on respiratory function, active smoking is exactly equivalent to the effects of taking a math test."

The main study finding was as follows: "The assessment of lung function demonstrated that neither a brief session of active e-cigarette smoking nor a 1 hour passive e-cigarette smoking session significantly interfered with normal lung function. On the other hand, acute active and passive tobacco cigarette smoking undermined lung function, as repeatedly shown in previous studies."

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