Furthermore, it is well known that electronic cigarette users do not inhale more deeply than smokers. While smoke does enter the distal airways - which is why adenocarcinoma rates have increased so dramatically - vaping involves aerosol inhalation and the aerosol is mostly absorbed in the upper, not the lower airways. As with a nicotine inhaler, most of the nicotine absorption occurs in the upper airways.

"“There’s so much we don’t yet know about e-cigarettes,” said Douglas Tipperman, M.S.W., a public health advisor at SAMHSA. “They are not harmless. We don’t know the health impact at the individual or the population level.”

The CDC has done enough damage with its irresponsible and untruthful propaganda about electronic cigarettes. It is time that policy decisions be guided by science rather than politics. And the science is now in. It indicates that youth smoking levels are at record lows, which casts serious doubt on the hypothesis that electronic cigarettes are fueling an alarming increase in youth smoking.

This seemed surprising at first as the current trend shows the high the PG level the more of the three chemicals that will be released. However a reasonable explanation would be the flavoring used in the 50/50 ratio E-Juice. E-Juice flavorings (especially the low quality type) can be alcohol based thus the increase of acetone being released. Capella and The FlavorApprenticeare two companies that avoid acetone in their flavoring solutions. Sonot all E-Juice have to have acetone.

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