Be careful with this... some think that it can help with Alzheimer and Parkinson.

Unless there's a demonstrable, important (life affecting) effect, I wouldn't care too much about nicotine. Maybe some people are even naturally balancing some of their brain chemistry with it.

I wouldn't surprised if in 30 years we 'discover' that nicotine was okay all along, just like eating fat.

By the way, what is your opinion on caffeine?