Ask and ye shall receive!
http://www.e-cigarette-forum.com/fo...2186-se-vs-fda-discussion-22.html#post1572810
thanks, kristin! that's really amazing...september is looking a lot brighter...
Ask and ye shall receive!
http://www.e-cigarette-forum.com/fo...2186-se-vs-fda-discussion-22.html#post1572810
In order for the medication to be aerosolized they use a "cosolvent" which is necessary for the process to work - and guess what they use (FDA approved) as the cosolvent - propylene glycol. Some of the applications even utilize "flavorings" as well. Again, so much for the FDA claims that "...we don't yet know what the effects of inhaling propylene glycol are, blah, blah, blah...."
Okay DV, I can see we're in need of an activist writer to research and expose the little-known business and political relationships between US corporations, certain government agencies and "health" organizations in their concerted effort to control the world supply of nicotine among a small group of businesses, thus eliminating all competition.
Know any writers up to the task?
During WWII, the effect of long-term Propylene Glycol exposure on animals was studied, with the following results:Unfortunately, they'll just say, "That product is for swallowing, not breathing in copious amounts daily. We still don't know the long-term effects of breathing in PG and flavoring."
---snip---
Does this help? And if it does, can you explain what it means?
---------------
May The Vapor Be With You
Hopefully, future safety/toxicity tests will be performed on vaporized PG to evaluate possible pulmonary toxicity at closer to vaping conditions. Thanks again.
Would the studies done on the use of glycols in theatrical fog machines, and the resulting standards that are currently in place, be closer to what you're looking for? I believe they look at higher concentration levels? For example:
http://www.esta.org/tsp/working_groups/FS/docs/cohen.pdf
http://www.esta.org/tsp/working_groups/FS/docs/HSE.pdf
http://www.esta.org/tsp/documents/docs/E1-5_2009.pdf
TSP - Working Groups - About, Camera Cranes, Control Protocols, Electrical Power, Floors, Fog & Smoke, Followspot Position, Photometrics, Rigging, Members
And in case you haven't seen it, here is a study done on varying levels of PG in tobacco cigarettes, that was looking for biological effects from increased PG, but did not find any:
Toxicological considerations on the use of propyle... [Toxicology. 2010] - PubMed result
From Yvilla's last link http://www.ncbi.nlm.nih.gov/pubmed/...ed_ResultsPanel.Pubmed_RVDocSum&ordinalpos=12The addition of PG to experimental cigarettes reduced concentrations of some smoke components (e.g. nicotine), but had minimal effects on the biological responses
I agree that more testing is needed, but I'm not clear how you would do a double blinded test on e-cigs. Further, part of the problem with testing is that no one can get past an IRB to do the studies even if they had the money. I memory serves, even Eissenberg mentioned some trouble with IRB approval as one of the reasons his initial study was designed the way it was.
How do you do a double-blind test in this application? The subject would know whether they were vaping, smoking or using an NRT. Or if you intend for some subjects to smoke and others to vape, you'd have a hard time getting IRB approval for a study which encourages the subjects to smoke. That is one of the issues with studies for getting "reduced-harm" approval for tobacco products. It's a catch 22. (I read about this very topic on Brad Rodu's blog: Tobacco Truth: Congressional Craziness: Requiring Population-Level Proof for Harm Reduction).
The point is that e-cigarettes shouldn't have the requirement to be proven safe for intended use so long as tobacco cigarettes aren't required to be proven safe for intended use!
All that should be required is accurate labeling, no toxic levels of chemicals added as cheap fillers, warnings about nicotine poisoning if ingested, no health claims or advertising aimed at children and child-resistant caps/packaging. The same standards given to tobacco cigarettes (plus a few specific to e-cigs.)
Has anyone gone over the Runyan financed, but independent lab, tests on their brand of electronic cigarettes?
On the basis of findings to date, inhaling mist from the e-cigarette is rated several orders of magnitude (100 to 1000 times) less dangerous than smoking tobacco cigarettes. The nicotine dose per puff is comparable to that of a medicinal nicotine inhaler. E-cigarette nicotine is apparently not absorbed from the lung, but from the upper airways.Is this the most comprehensive study done to date?
<http://www.healthnz.co.nz/ecigarette.htm>
----------------
May The Vapor Be With You
And in case you haven't seen it, here is a study done on varying levels of PG in tobacco cigarettes, that was looking for biological effects from increased PG, but did not find any:
Toxicological considerations on the use of propyle... [Toxicology. 2010] - PubMed result
The graded inclusion of PG into experimental cigarettes resulted in increases in the smoke concentrations of propylene oxide, at very low concentrations.