[GovernmentShrinker]

Smokers have a greatly increased likelihood of dying prior to the average age of Alzheimer's onset. That's one way of reducing your chance of getting the dreaded disease . . .

[Antioch]

I'm not defending smoking, but apparently nicotine itself does have benefits to Parkinsons and Alzheimers

http://www.forces.org/evidence/hamilton/other/nicotine.htm