It's quite hot air in your lungs, and isn't gonna do anything good. Not hot enough to scald you but the interface in alveoli is very sensitive to changes in co

It's quite hot air in your lungs, and isn't gonna do anything good. Not hot enough to scald you but the interface in alveoli is very sensitive to changes in consistency, thickness and makeup and it'll change how well you can absorb oxygen. Plus it's irritating which can cause inflammation, making it harder to breathe. Not something you'd notice normally but all of that will lower your lung capacity for quite a while. At super low power it's pretty much totally safe and the impact on breathing is temporary[1]. At ~>18 watts formaldehyde starts to become a possible irritant, and there are also lots of other carbonyls. One of the really fun ones in the graph in [1] is acrolein- it's still at extremely low levels but that shit is not anything you want in your body. It's generated in small amounts any time anything fatty is burned, but absorbing it through your lungs daily is a totally different thing. Vaping at low power (<20 watts) is pretty safe, but my girlfriends vape goes up to 200 and she uses it constantly at 85 or so. There are definitely significant amounts of chemicals besides glycerine and propylene glycol. [1]: https://monq.com/vg/ https://monq.com/vg/