That's not what does you in. What causes all the problems is burning processed tobacco and inhaling smoke. That's where you get the tar from - and the damage.
Extraction is more about getting flavor out of the tobacco - you actually get very little nicotine out of the kind of "at home" processes we can do. You also get some alkaloids - that "missing ingredient" a few people just have to have in order to quit smoking with vaping. But again - you still aren't burning anything here and that's what is important.
There is a lot of information on NET's in the DIY forum. As far as I'm concerned a NET liquid is the only thing that comes close to an actual tobacco or cigar flavor. But since you aren't burning anything it's more like "it tastes like the smell of a good unlit cigar." That's about as close as you will ever get with vaping.
Hi thanx for the info. Guess I'll have to get a cigar or 2 to try it out soon!