The smoke juice contains four prime ingredients - PG (propylene glycol), water, nicotine (not in some cases) and vegetable glycerine. When you switch ON the electronic cigarette, battery starts to heat the smoke juice which is present inside cartridge. As a result of heating, dense vapor which resembles smoke is exhaled. Smoke juice Australia is also referred as electronic liquid, e-liquid or nicotine fluid. Here, nicotine is optional in e-liquid because some countries ban the product if it contains the substance. However, you can choose product with or without nicotine legally. The nicotine strength is also varied among products hence have a careful look over the ingredients label while buying.
Many smokers have doubt whether the ingredients in smoke juice is toxic or not. FDA, after long research, have approved the ingredients in smoke juice since it is non-toxic (expect nicotine). Propylene Glycol, the base ingredient, is responsible to provide powerful throat hit. PG (Propylene Glycol) is safe and it is used in number of food products and household stuffs. Since PG lacks in taste, e-liquid flavour is added. The last ingredient to be discussed is vegetable glycerine. Again VG is natural substance which are derived from plants and herbs. You can also see this stuff in tooth pastes, medications, bakery products, shampoos etc. This offers mild sweet taste and the taste enhances when it is mixed with flavour substances.
Hence it is clear that smoke juice Australia contains only non-toxic, edible substances as ingredients. Though nicotine is toxic, it is purely optional for you to purchase electronic cigarette with or without nicotine.