"I am sure that the nicotine may do something for you but I have nevr heard of any studythat said it speeds upmetabolism."
"Anyone have a surce for this data....I would like to know for sure!"
BIG E, do a simple search, for nicotine AND thermogenesis, on Medline or Pubmed...there should be numerous articles on this topic.
Nicotine increases metabolism in a similar manner as caffeine, it stimulates the release of norepinephrine.
"Nicotine being a stimulant will obviously increase metabolism initially, but prolonged use will slow all bodily functions, including digestion, metabolism, and circulation."
NIMROD, I have never heard of this effect, please show any references to this effect.
"Aside from that, it is extremely dangerous, sixty milligrams of nicotine taken at one time will kill the average adult human being by paralyzing breathing. It's about as lethal as cyanide. The reason it doesn't kill smokers quickly is that they take it in tiny doses, which are quickly metabolized and excreted by the body."
Nicotine's acute toxicity is a non-issue, since nobody dies from acute poisoning. Cigarettes only contain around 1mg each, so there no way in hell someone is going to smoke 3 packs at once. If they do then it is simply evolution removing the mentally weak from the species.
Please do not misconstrue this post and think that I advocate smoking; I do not. But nicotine is now available by itself and is not the harmful agent contained in smoke. I believe that nicotine has some uses in dieting and possible long term mental health.