Many researches have proved that electronic cigarettes are generally safer compared to tobacco cigarettes. This is because the substances used to make the nicotine solution are all very safe – aside from the liquid nicotine, of course – and can be commonly found in other food products. Before you go ahead and buy cheap electronic cigarettes, we are going to take a look at the substances used to make the nicotine solution in this article. The main ingredient is of course nicotine. However, you can choose between different levels of nicotine according to your preferences. The highest level of nicotine found in an electronic cigarette refill cartridge is 16mg, while other lower options of 12mg and 6mg are also available. You can also choose to use refill cartridges with no nicotine if you want to enjoy the same smoking sensation without having to worry about addiction to smoking. Glycerol or glycerin is also used in the process of making the nicotine solution for electronic cigarettes. It is used as solvent and sweetener, making the nicotine solution much easier to turn into mist or vapor when heated. Combined with the atomizer heating mechanism, you will get the same white smoke-like vapor coming out of the mouthpiece when you inhale through the electronic cigarette. Different essences are used depending to the flavor you are choosing. If you want to enjoy some menthol cigarettes, for example, you can get electronic cigarette refill cartridges with menthol flavor; of course, you will find that menthol essence is used to recreate the same flavor and sensations you get from smoking menthol tobacco cigarettes. Other substances including organic acid, anti-oxidant compound, and propylene glycol are used to form the nicotine solution and recreate the same smoking sensation you get from smoking tobacco cigarettes. These substances are very safe and they make smoking electronic cigarettes relatively safer as well.