One can be allergic to PG and/or VG.
The chances of being allergic to any of them are, nonetheless, very low. Both are common components in everyday items.
Well, although I prefer using PG as I suspect it may be safer (mainly because of lower vaporization temperature), there's no real evidence either way.
Tomorrow, somebody may very well determine it's the other way around, or that they are equally safe or unsafe.
As with most things, it's all a question of how much of the substance is there.
ex: I'm not worried about the amounts of dihydrogen monoxide detected in e-cig vapor for example, as I know the concentrations found are not enough to cause harm.
Some additional materials from that study:
Interesting to notice the difference between stated and real levels of nicotine.
SUPPLEMENTARY MATERIALS MATERIALS AND METHODS
Supplementary Table 1 - Detection and quantitation limits
Some additional materials from the study:
Interesting to notice the difference between stated and real levels of nicotine.
SUPPLEMENTARY MATERIALS MATERIALS AND METHODS
Supplementary Table 1 - Detection and quantitation limits
No info on this from any bright minds in the forum?
I tried some searches but until now only found generic references to the fact that heating PG to high temperatures produces formaldehyde without concrete info about the temperatures.
No, not because of any FDA claim.
Recent vapor studies have found formaldehyde on e-cig vapor. See the previous post for an example.
The amounts found vary a lot between different e-cig models/brands, and can get to relatively high values (about half of what is found in cigarette smoke, on some...
Does anyone know what is the influence of temperature in the break down of PG into formaldehyde?
Apparently there is also a process for VG to turn into formaldehyde, but it may be different. (oxidation or hydrolysis of glycerin?).
The questions arise from the recent studies that detected...
You're right. Controls are required for something like this.
Perhaps some day.
Results would certainly be valuable.
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Study here: http://www.ascpjournal.org/content/8/1/5/abstract
Abstract (provisional)
Background
Nicotine is widely recognized as an addictive psychoactive drug. Since most smokers are bio-behaviorally addicted, quitting can be very difficult and is often accompanied by withdrawal symptoms...
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