So I'm totally not a vaping expert, I just know that in every case that I read about of someone being hospitalized because of vaping, it was because of such oil

So I'm totally not a vaping expert, I just know that in every case that I read about of someone being hospitalized because of vaping, it was because of such oils. My understanding is that the "juices" these devices are designed for and most of the mainstream ones from the "official" sources are water-based fluids with a small amount of drug and flavoring added. I believe vaping oil is quite problematic, regardless of the source. No idea if "black market" oils have actually been adding bad things to the oils, or what. Like I said, not an expert myself.