Re the medical advice at the bottom on #18 -- none of the four links are peer-reviewed, and the one-peer reviewed study linked from inside on of those links is mouse research. This evidence comes no where near meeting the Hill Criteria of Causation
used to conclusively prove tobacco smoking as a whole is dangerous.
I had no idea coming in when people should and should not be using nicotine. And reading those last four links in #18, I still don't.
I realize that you were just responding to xg4bx, who also made a medical claim about nicotine. In general, I would question whether MobileRead is a good source of medical advice.
I would personally suggest http://www.cochrane.org/
as an alternate web-based medical information source. But, then, since you read it here, don't believe it