the manufacturers dont release the recipy because its the flavour they wanna keep for themselves. Do you know what is in the coca cola ?
no they only release 'plant extracts'
from the studies, we do know what chemicals are in it.
its simple, u got PG, VG, flavoring, sometimes a bit of water, or alcool, sometimes u get some sugarish additives, stuffs like that.
thats not really important actually, whats important is what u inhale and the chemical formations resulting from the processus.
as i mention before, there is no combustion, but the liquid get vaporized by heat, and therefore u get chemical formations in the vapor.
that is what is important to check. The most dangerous chemical that could result from the heat would be the acrolein, but again u only can get acrolein at higher temps that what u can get in our usual vaping units. u have other chemicals formation from the processus but way less than a real tobacco cigarette.
and btw some liquid manufacturers get their liquid checked by health institutions already.
a real cig countains about 7000 different chemical coumpounds, most of them are dangerous. The manufacturers even put poisoning additives and the FDA doesnt say anything about it, do they ?