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Propylene glycol vs propanediol allergy/irritation
Does anyone know whether someone allergic to propylene glycol can typically use propanediol?
I have heard of people allergic to PG and not to PD, but it was anecdotal and I am hoping to hear if you have more information.
I read a paper with data showing that PD is much less irritating than PG. The two are really not the same.
But when it comes to allergy, does anyone know whether PG allergy and PD allergy are generally different?
(Such that if you come out as PG allergy positive in an allergy patch test, you should or do not have to avoid PD as well?)
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