The additives have been around a long time in the food industry but also in the tobacco industry, most often identified as "agents texture and flavor." They are numerous and can be either of natural origin and synthetic.
Optional in the preparation of e-liquids, additives can improve or adjust the taste (enhance the taste of certain aromas, rounding the final e-liquid, to sweeten or to give it a fresh feeling ). However, it is recommended to start from the most simple with only one flavor per recipe and gain experience later during your DIY revenue preparations by adding one or more additives.
The fact that they give a mixture is often quite noticeable and their use can be beneficial in some type of recipe and totally discouraged in another. It is therefore to be used with care, not for any toxicity but because it is essential to remember that an additive, by nature, should "add" something to the recipe and not "do" Recipe !
An additive has a taste, of course! Can be easily used vanillin, sucralose, or malic acid. They add the binder, sweet but never do use them as flavoring. An additive dosed to 40 drops for 10ml is not an additive, it adds nothing, it is necessary. Take ethyl maltol, put in 2 to 4 drops in a mixture of fruits and you will effect the famous "sweet" desired, put 40 drops and you have a pretty disgusting mixture of very sweet indeed and even very bitter time.
Note: A good amount of these additives are already present in certain flavors, such as eugenol in clove aroma, Massoïa in flavorings cream ...
Tip: stay in amounts of 1 to 3% of your base liquid mixture + flavoring (s) concentrate (s), additives are usually very powerful.
Almost all of these additives are used by the tobacco industry as agents of texture and flavor. If, for some of them, safety seems obvious, it can not be over for all. But it is the same for certain flavors. We must also remember that "natural" does not mean "non-toxic"!