You might want to take a look at this.
The Great Nicotine Myth
Here is just one of the points from that link.
"Nicotine, by itself, has no observed potential for dependence. That is to say, pure nicotine administered to never-smokers or never-users of tobacco in clinical trials is not demonstrated to create dependence. Just to make this clear:
a) Not a single one of the many clinical trials of pure nicotine administered to never-smokers, for investigation of its potential benefits in multiple clinical areas, report that any subject ever exhibited any sign of reinforcement, dependence, withdrawal syndrome or continued use - despite subjects being given high doses for months.
b) Nicotine cannot be shown to create dependence; in every clinical trial published, no reinforcement or dependence was demonstrated.
c) Dependence on nicotine has never been demonstrated in those not exposed to tobacco use in some form.
d) There are no published clinical trials that report dependence is observed when nicotine is administered to never-smokers. All such trials for investigation of nicotine's nutritional and medical value report no observed measure of dependence, withdrawal symptoms, or continuation of use - no matter how much is administered or for how long."
nicotine is nicotine.. doesnt matter what source it comes from.. it's addictive.
what this test performed on vapers?.. they vaped nicotine eliquid for few months and didnt get addictive?