unfortunately that data wouldn’t actually answer the question. Going by posts on these boards, it seems that most people with PG sensitivity find they can get away with reducing the PG to bare minimum. Obviously, if your PG is coming from the flavourings only , then just switching to MF could sort it.
That’s not to say that continued low-level exposire. like you’d get from vaping, would be harmless. In some people (with IgE reactions) that kind of thing works to decrease their sebsitivity (over a very long period of time, under close medical supervision) . In others it has the reverse effect. I’ve endeavoured to keep the PG-content of my vape at zero, because I already know that I belong to that latter group.; and there’s no guessing how many others.
So yeah, mad though it may seem, I might actually have to stop using MF. And this info might explain a few symptoms that I’m getting at the moment (though i’ve got a list of possible alternative culprits, TBH)
As for the argument that PG-allergy is due to PG being a petroleum priduct: that was always just an unsubstantiated assumption; and not a very convincing one at that, when you consider that allergens contain protien, usually .And I’m sorry to hear that’s now been accepted as a fact by intelligent people.
Since word got out that PG is nowadays commercially extracted from plant material , that assumption looks all the more shaky.
Nobody knows the answer though, and nobody’s in a position to even make an educated guess. Why not? because, whatever the source of the PG is, it doesn;t appear on the label. and manufacturers of PG-containing products can and do chop and change their source without notice.
Ofc it might easily turn out (if it ever gets properly tested) that some people react to petroleum-based PG, some to corn-based PG, and so on. Why on earth should we expect one single definitive answer? But since corn contains protein and protoleum doesn’t , my money would be on the corn as the culprit, if i had just those two to choose from
