As you all are probably figuring out by now I have been Mr. Research both for my own vaping use and especially before I started a petition in support of it. Constantly seeing people talking aboutvaping ingredients "specifically propylene glycol" and thought you would all like this link. While I have ready MANY MANY studies I'm hoping you will all find the source to be credible enough for you!
I especially like this line: Concentrations in foods range from <0.001% in eggs and soups to about 15% in some seasonings and flavorings. Propylene glycol is an FDA-approved additive for military dietary rations (Agency for Toxic Substances and Disease Registry 1997).
Ethylene Glycol and Propylene Glycol Toxicity: What is Propylene Glycol | ATSDR - Environmental Medicine & Environmental Health Education - CSEM
I especially like this line: Concentrations in foods range from <0.001% in eggs and soups to about 15% in some seasonings and flavorings. Propylene glycol is an FDA-approved additive for military dietary rations (Agency for Toxic Substances and Disease Registry 1997).
Ethylene Glycol and Propylene Glycol Toxicity: What is Propylene Glycol | ATSDR - Environmental Medicine & Environmental Health Education - CSEM