PROPYLENE GLYCOL (อ่าน 1066/ตอบ 0) Propylene Glycol: The Good, the Bad and the Alternatives (NaturalNews) Mention Propylene Glycol (PG) to most people and they will probably tell you that it is a toxin. On the other hand, PG comes in more than one formulation, so it needs to be clarified as to which formulation is meant. The real question is, does it make a difference which one is used, since it is used in everything from hydraulic and brake fluid to snack foods? The answer is: it does and it do...