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Ecigs deliver the nicotine, plain and simple. The ability of ecigs to make ultralight and light smokers develop symptoms of nicotine overdose offers compelling evidence.

I've mentioned it before, but when comparing nicotine blood levels (nicotine has a short half-life of 2 hours) and cotinine blood levels (much longer half-life for cotinine around 20 hours), the peak blood nicotine level is over-emphasized since it drops rapidly.

What this means is that while nicotine level ...