First time I heard an BS like that. Sounds like something an anti-smoker made up. There is NO OIL in ejuice.
(a quote someone made about the same subject)
There are a lot of individuals mislead about what PG is, or what e-cig juice is.
It is simply a low glycemic sugar, like veggies, and is totally safe,yet the FDA wants; to condemn e-cig juice as everything from antifreeze to poison.....YET The FDA has it listed as a approved food source ? (give me a break)
Is it an antifreeze? Yup! So is alcohol. Anything added to a mix that slows freezing is consider to have anti freezing qualities. It is NOT what is in the radiator of your car, or what some might use to off the neighbors cat that pisses on your front porch.
What the FDA did find was a few tainted carto's with a very small percentage of real antifreeze in them, toa level that was absolutely harmless. This was way back in ~2008 or so. The industry policed itself and there hasn't been an incident since. It was all the ammo they (thought they needed to start a barrage of anti e-cig following, and they have been getting other org's following their FDA lie. Including the Lung Assoc, Military Services, Politicians looking for tax dollar, and I'm just touching the iceberg tip.
PG has antibacterial/antimicrolal qualities and is even considered to help prevent diseases in miniscule amounts. That was one study used forfinding what mist to pump into hospital ventilation heating systems, and is now used in hotel systems as well.
It is used in fog machines at concerts, and was heavily tested for long term effects by OSHA, many years back.
The studies are out there.
I suggest if you do want to vape VG instead (which I do, because of the added fog qualities of it) that you mix a touch of PG with it for the bacterial properties. I don't know for sure if it will stave off disease in our use, but suspect it will. It staves off pneumonia for one. Soit sure can't hurt.