Do you have an example on anything that's *completely* safe in our lifes? I don't. So no, we were not saying vaping is completely safe. Nothing is. But i'll be dammned if it *not* much safer than smoking...
"For all we know it might kill us", and "the data just isn't in yet"... well, I beg to differ.
PG has been studied since the 40's. It has been widely used in the medical field as a solvent on formulations to TREAT lung diseases. (Whenever the drug/medicine to be applied is not very soluble in water).
So, it is no great wonder that Hon Lik, as a PHARMACIST, resorted exactly to the medical field in order to find a solution for this problem: "What should be used to replace cigarette smoke on this 'mimicking-smoking' device I'm currently working on?"
The solution seems obvious: a thick vapour. OK. Produced from what? From a substance regarded as safe, already used on the medical field to be inhaled, and capable of dissolving some drugs - including nicotine.
So, there is already a lot of INDIRECT data. For all we know so far, it WON'T kill us.
"But, one thing is to a short treatment period with PG, another is to use everyday. Our lungs were not 'made' to inhale it everyday", someone told me recently. Well, guess what? Our lungs were not 'made' to inhale cigarette smoke everyday, either!
No short-term study on cigarette smoke would deem it as "safe", but we "need long-term studies to be sure". Nope. With cigarette smoke, it's more like like "we have short-term studies to show that it is bad", but we need long-term studies to "know just how bad it is".
With vaping, of course, we know at least it is safe to be used short-term.