I’ve been studying vaping and its affect on health for a long time, and made conclusions that it doesn’t affect on your body if:1. You use low nicotine liquid (3mg/120ml or less). In this case to get 3mg amount of nicotine into body, you need to spend one week or even more. Also, when heated, nicotine destroys and final amount is even less (that’s with vaping nicotine addiction is mostly psychological, than physical).2. You use right metal for coils and proper temperature control, so it don’t produce bad chemical compounds when heated.3. You drink enough, because glycerine takes water from your body.4. You use classical RDA vape and keep your coils and cotton always clean.5. You avoid using liquids with artificial flavorings and sweetener. That’s the hardest part, as you need to exactly know how liquid was produced.It even can do some help to health, for example many people with bronchitis issues feel better when vaping.