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>> The ingredients in cigarettes are what actually make nicotine addictive

Uh, that sounds wrong.

"Snus" users get addicted. That is tobacco, even if it isn't burned. But afaik, users of e-cigarettes also get dependent -- that isn't tobacco.

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> But as laboratory scientists know, getting mice or other animals hooked on nicotine all by its lonesome is dauntingly difficult. As a 2007 paper in the journal Neuropharmacology put it, “Tobacco use has one of the highest rates of addiction of any abused drug. Paradoxically, in animal models, nicotine appears to be a weak reinforcer.”

http://www.salon.com/2013/12/29/sciences_obsession_the_searc...

There's a bunch of on-going research on nicotine gum dependence too. I was a participant in a study for this.

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