Another
thread was posted just this morning about no more colds since
vaping came into their lives
Makes sense, since PG is a germicide
Making claims like that would be considered a "medical claim" and you would have to have reams of data to prove it in order to advertise it. FDA doesn't care about that as they know it would be virtually impossible to validate it.
That might not be so hard to "validate", since it's used in asthma inhalers with the FDA's blessing.
With regard to PG, if you were born in a hospital, the first breaths you drew on this earth were well laced with PG --
It's been in use in hospital ventilating systems for many decades because it's a germicide.
Because of the PG scum problem, it's mostly been replaced with micropore filters.
Also, many surgeons and OR nurses have spent 12 hours per day, five or six days per week in operating theaters for their whole careers, and operating theaters used to get really heavy doses of PG via the ventilation systems.
So did office buildings, and retirement homes to help prevent the spread of germs.
The FDA has called it "generally recognized as safe."