Cigarettes seem to deliver nicotine far more efficiently than an ecig, I've never got that same headrush from vaping that you get when you smoke a Newport Red for instance. Most of the current studies indicate little to no nicotine delivered to the bloodstream. These were all done with cig-a-like devices though, I would be interested in seeing some Cotinine tests after vaping something likemy Provari or Sabre Max and a Genesis. Even with those, though, I never seem to get that huge headrush even with 24mg.
This has not been my experience in the least bit! Nicotine by itself is a stimulant and when I vape, I get stimulated very quickly. Why is it this never happened with cigarettes? It is most certainly due to the alkaloid mix and abundance of "other" stuff. I think people (not saying you) think that straight nicotine should effect them the same way as it did when they smoked, but nicotine was not the sum total of what smoking delivered.
Here is a test that Dvap did that may interest you: Cotinine Testing by Dvap
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