Unsure. Never been able to narrow it down.... never needed to so far, unlike with say - propylene glycol which has hospitalized me several times. (I react badly

Unsure. Never been able to narrow it down.... never needed to so far, unlike with say - propylene glycol which has hospitalized me several times. (I react badly to most "alternative sugars", which might be related). But then I also have some problems with fructose.