Well I have had a very gnarly reaction to the Wintergreen Nobacco (migranes and stomach issues) I usually vape the WOW Peppermint with no problem whatsoever so I do not think it is the PG. I have found though I have a similar reaction to carrageenan which is being used in more and more things these days to include food hygiene gear and even some brands of e-juice. I'm wondering if anyone knows or if the staff can confirm if the wintergreen has carrageenan and if the WOW Peppermint does not. Thanks!