The issue with nicotine vaping is that the nicotine needs a carrier, which is usually (always?) propylene glycol. Glycol is fine to ingest, but not inhale. In a

The issue with nicotine vaping is that the nicotine needs a carrier, which is usually (always?) propylene glycol. Glycol is fine to ingest, but not inhale. In addition, oil/glycol vapes produce some combustion, and glycol can produce some pretty toxic stuff when burned. If you get unflavored oil/wax that was extracted using superfluid CO2 as a solvent, there is nothing that wasn't originally in the plant. It should be strictly no worse, and probably much better than smoking. However, the cheaper and/or flavored vape cartridges often were extracted using glycol, and thus have the same problems as nicotine vapes.