What fire breathing fuel is the least toxic?
In the USA at least, fire eaters mostly use white gas. For fire breathers, the recommendation is ultrapure lamp oil (which is pretty much the same thing as mineral oil). You can also use flour or non-dairy creamer (or pretty much any powder that has a high surface/volume ratio). There’s very little risk of ingesting fuel when eating fire since there should be very little on your wick. There is, of course, a huge risk of swallowing it when breathing fire, as well as absorbing it through your mucous membranes, not to mention blowback, chemical pneumonia, tooth rot, setting your face on fire (all of these things have happened to friends of mine), etc. I’ll second Mr HappyGoLucky: don’t breathe fire, especially if you’re asking this question.
Back in the day, I used kerosene and lamp oil (paraffin) for fire breathing. The lamp oil was far more pleasant to hold in my mouth. I can’t tell you which is the least toxic, but after one crummy night where I apparently swallowed some fuel I can tell you that kerosene burps are really disgusting. Make sure you have a wet towel for smothering fires and keep your fuel out of your practice area.
