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Of particular note, with the Geiss et al data, there are now at least three findings on the topic of significantly raised levels of carbonyls, formed by the thermal decomposition of solvents: the carcinogens Formaldehyde and Acetaldehyde, and the recognised toxins, Acrolein and Acetone.
These are the three papers, including Geiss et al:
On the topic of these substances, found in the levels identified, probably the two most prolific physical scientists in the field of electronic cigarette experimentation, Maciej Goniewicz and Konstantinos Farsalinos, have had the following to say.
Maciej Goniewicz, here";http://www.prwe... states that:
&nbsp;“These results suggest that some types of electronic cigarettes might expose their users to the same or even higher levels of carcinogenic formaldehyde than tobacco smoke. Users of high-voltage e-cigarettes need to be warned about this increased risk of harmful effects,”
&nbsp;Dr Farsalinos here states that:
&nbsp;“the levels of carbonyls emitted from e-cigarettes can (under certain conditions) be similar to or higher than smoking”, and also that
&nbsp;“Of course we continue our research efforts because we need to learn more about e-cigarettes. Of course we are concerned about some issues, such as e-liquid composition (despite the lack of combustion and the absence of cured tobacco) and temperature of e-cigarette use (despite being almost 5 times lower than smoking), not because e-cigarettes may be more harmful than smoking but because we want to find ways to make e-cigarettes even less harmful than they currently are.”
I would respectfully suggest, therefore, that these concerns, raised by these key scientists passionate about the potentials of ENDS, are not raised from a “minor, hypothetical or imaginary” standpoint, as proposed here"; . Significantly, moreover, Dr Farsalinos here states that:
&nbsp;“Obviously, every non-smoker also deserves to know that the e-cigarette is not a safe new habit for everyone to adopt but a tobacco harm <STRONG;reduction</strong; product. ”
As has been pointed out, as e-cigarette manufacturers <EM;do not limit the sales of their products to current smokers </em;. . . . . . . surely all users AND potential users need to be made&nbsp;aware of these important safety concerns? Misleading comparisons by some between nicotine and caffeine will not help here. Dr Farsalinos has indeed proposed recently a new study on the effects of temperature on fluids here
which&nbsp;I assume he is undertaking, not&nbsp;because of minor, trivial or hypothetical concerns, but because of&nbsp;his previously stated concerns, stated above.
David Bareham

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