Not 100% allergic to PG it seems thankfully.
It took awhile trying different percentages in home mixes but it seems I can tolerate up to 30% PG. At 35% or more I break out in hives, itch and my
throat starts giving me issue's.
10-20% doesn't bother me , 25-30% I can tell it's there but not a full blown reaction.
I've also always had issue's with certain makeup, shampoo's and soap (stuck with mineral makeup) so I may just be sensitive in general.
So far all day with the GP vg and I'm fine.
I wish we knew more about PG allergies.
I would bet it probably varies in severity from person to person.