Matt Portor wrote a good article on nicotine for fat loss a while back. Probably lost with the whole PP issue though.
I don't smoke any more(was always on and off), but loved a cigarette with my morning coffee. On occasion I'll buy a pack of the Camel Anus, and suck on those. Def helps with appetite.
Here a few quotes from Matt.
Its essentially using nicotine combined with caffeine/ephedrine etc... for dieting in regards to Leptin hormone, anti-aromatase, ghrelin, BAT fat tissue, satiation, etc,,,,,
-Matt
100 mg caffeine + 1,g nicotine (viagum) will have maximum thermogenic response and going higher than 1 mg will cause adiminishing return effect, not addictive effect.
-Matt