Jae, I'm sure you will be fine using food-grade glycerine. If it is safe to put in foods (think it gets used in things like wedding cake icing) it is as pure as it needs to be for vapouriser use. I've found the downside is it is the glycerine is thicker than most juices so added a little vodka to get the consistency back to about where it should be.
I find it quite fun mixing things up to suit myself, hope you will too.![]()
thank you to you too, Tetsab!
(if there was an editing feature, i would have added that to the previous thanks...alas).