..despite dozens of studies of late - US and elsewhere - ending in the opposite conclusion.
A follow up:
Worth a look:
https://www.gov.uk/government/uploa...mmissioned_by_Public_Health_England_FINAL.pdf
EC= e-cigarette
Go to pg 76: 10. Safety of e-cigarettes in the light of new evidence
"We were asked to review these studies to see if in the light of this new evidence, the conclusions of the PHE 2014 review need to be adjusted. We present below the details of these studies together with any additional data that may assist with their interpretation."
...
"The EC was puffed by the puffing machine at a higher power and longer puff duration than vapers normally use. It is therefore possible that the e-liquid was overheated to the extent that it was releasing novel thermal degradation chemicals. Such overheating can happen during vaping when the e-liquid level is low or the power too high for a given EC coil or puff duration. Vapers call this phenomenon ‘dry puff’ and it is instantly detected due to a distinctive harsh and acrid taste (it is detected by vapers, but not by puffing machines) [139].
This poses no danger to either experienced or novice vapers, because dry puffs are aversive and are avoided rather than inhaled."
"Although e-liquid can be heated to a temperature which leads to a release of aldehydes, the resulting aerosol is aversive to vapers and so poses no health risk.
Summary
"There is no indication that EC users are exposed to dangerous levels of aldehydes."
Other informative stuff follows to end of page 80 - ie. more on how studies don't resemble real life vaping.
Much of the 'bad stuff' occurs with overheating and the dry puffs that follow that. With many using VG, the viscosity of
pure VG can end up clogging many coils. I think (studies should be made on this) that diluting VG with distilled water helps (some eliquid manufacturers do this - Decadent Vapours(DV) and Ecopure have an 80:20 VG to H20 ratio.). This lowers viscosity to around the level of PG and as a result tends to reduce the clinging and clogging on coils where burning can occur.
I use DV's AG (Aqueous Glycerin - an 80:20 ratio of VG:H2O) in all my DIY and add it to some eliquid vendors that don't dilute their VG - BackWoodsBrew and Ahlusion. I've successfully used this same ratio to make "AG" by using NOW VG and distilled water. They blend easily and you end up with longer coil life as a result. And you still get the added vapor that VG gets you.
I'd like to see all VG manufacturers/vendors use this or similar diluting ratios.