The next step in risk reduction is to use flavours that have been specifically produced for inhalation such as those from FlavourArt, Italy. They have put a lot of resources into researching such issues. read more
Ideally, you should not inhale anything that is not licensed for inhalation in medical therapies. Of course, that makes things a bit difficult as only menthol and a couple of other simple flavours have such a license. read more
Food coloring is not approved or tested for inhalation, we havent a clue as to what the effects may be of inhaling food dye over a long time or even short. We should be limiting the chemical exposure in our juices, not adding to it just for cosmetics. read more