Interesting question. As far as I can gather , VG intolerance/allergty is incredibly rare (and almost certainly caused by impurities in the VG, rather than the VG per se) , but that's not to play it down. It must be just as big a pain as PG allergy is...well, apart from the fact that they don't put VG in asthma inhalers, so it won't stop you treating your athma.
I should think discussion of other allegies suich as that would be acceptable in the PG-free subforum. I'd rather not call it an allergy subforum though (not just to make that exlicit) given that there's a pretty strong agument in favour of PG-free juice , whether you're allergic or not , and given that suppliers of PG-free juice are NOT just marketing their product sfor PG allergy sufferers. They are appealing to a wider market. which trend should be given every encouragement.
Tough. hmm. Let's pretend this is a serious question, and answer it:
Would you quit vaping and go back to smoking if you couldn't get your hands on a decent MTL tank? (I did, when I couldn't get PG-free juice. No choice. If your ecig triggers your asthma, you literally can't vape the thing anyway) Do you have difficulty doing a forum search on "mouth to lung" ..or do the search engines happily accept all variants of that phrase as containing quite enough characters to constitute a proper word?
Unless your answers to those questions are highly unexpected, I submit that my need is considerably greater than yours.
Not that i'd mind you having said subfora , should a serious demand exist.
But, then given their appearance in this thread, not a dedicated thread created by yourself, I think I can safely assume that you're speaking rhetorically.