Some good news regarding E-Cigs...
http://www.cspnet.com/news/tobacco/articles/study-e-cig-vapor-less-injurious-cigarette-smoke
http://www.cspnet.com/news/tobacco/articles/study-e-cig-vapor-less-injurious-cigarette-smoke
The article's mention of formaldehyde really surprised me... what in an e-cig would produce the amounts mentioned?
I don't know. It's a by-product of something or other breaking down. The important thing to note is the amount. They found a few micrograms - the same amount in an FDA-approved Nicotrol Inhaler.
Dr. Mike and those suspecting PG in the formation of formaldehyde appear to be wrong. The particular study mentioned here does not specify the specific makeup (or PG versus glycerin content) of the liquids studied.
BUT, many of the same authors are presenting a paper at the SRNT meeting in Boston this week that DOES. And from the following it is pretty clear that indeed it is glycerin, and not PG, that is associated with formaldhyde (and acrolein) being found in vapor:
...snip...
Formaldehyde and acroleinwere only found in vapors generated from glycerin-based solutions
(0.116±0.022 and0.110±0.190μg/30 puffs) and in tobacco smoke (12 and 32-fold higher levels,
respectively).
Here is an explanation about formaldehyde by Yvilla:
http://www.e-cigarette-forum.com/fo...91973-formaldehyde-e-vapor-2.html#post8946379