Moved this from another thread as here is more appropriate.
Summary of post: I tend to agree that nicotine alone is not that addictive (yet smoking is known to be fiendishly so) - and that is a primary reason why vaping does not work out for everyone (something that could be addressed).
I often read the newbies experiences because it is very illuminating. And the anecodatal evidence quite strongly suggests that nicotine alone is not very addictive. Once people transfer to vaping (nic only), and have done so for a week or two, many find they can switch to zero nic without a problem (and others still enjoy their nic hit but may well no longer absolutely need it - something of a guess but could easily be tested - by members here or in a larger scale controlled study).
This is why patches and gum have a low efficacy for smoking cessation; quite possibly they work little better than placebo patches / gum would, I'd suggest.
Vaping does much better because it is more like the original habit - hand to mouth and the 'smoke' - plus a nic hit that is more immediate than patches (which are perhaps not supposed to be) and maybe even than gum since the nic is inhaled. This has proven to be (i'd say) sufficiently effective for about half the tryers of vaping (perhaps less because we likely dont hear of many giver uppers - but that might often be accounted for by the trials of the vaping outset - poor tasting carts in the starter sets, getting used to fiddling with battery chargers and loose connections, and generally needing to learn some new ways and knowledge.
However, what does make analog smoking addictive cannot be effectively overcome by present vaping of just nic (even with the hand to mouth and 'smoke'/visible vapor) for some 50% of people (perhaps less). And I think that the something missing (probably MAOIs) is the key - both to the dropout percentage and the addictiveness of the analog (either in itself or through combination with the nic). The following study, among others, supports the latter point - and by inference the former too):
Monoamine oxidase inhibition dramatically increases the motivation to self-administer nicotine in rats
The key implication is as follows. The reality is that without the opportunity to vape something more than just nic, if desired, there are many who will stick to analogs (and their hundreds of nasties via manufacture processing and, particularly, combustion). Being addicted is bad only in so far as the thing one is addicted to is bad. There is no good reason to think that a nic + MAOI liquid (or even a WTA liquid) for vaping would present any significant adverse health effects; certainly not in comparison with analogs.
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Snus is a solution for some, wh do not need the hand to mouth and 'smoke' so much, but also doesnt appeal to all of those who dont take to vaping because of the something missing.
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If anyone reading this is thinking of giving up on vaping because of the something missing, a suggestion that might help - try passion-flower supplement or tea alongside.