I stumbled upon this article from Xinhua stating that smokers and coffee drinkers are less likely to develop Parkinson’s disease. Quoting the article:
Smoking cigarettes and drinking coffee may protect people from Parkinson’s disease, according to a new study in the April issue of Archives of Neurology out Tuesday.
“What this study tells us is there is something about cigarette smoking and consuming caffeine that alters the biology underpinning of Parkinson’s disease,” said Professor William Scott,a leading researcher at the Institute of Human Genomics at the University of Miami.
I did find an exerpt of the study on Arch Neurol and it has this conclusion: Inverse associations of smoking and caffeine were corroborated using families with PD, thus emphasizing smoking and caffeine as important covariates to consider in genetic studies of PD.
Yet another reason (or excuse) for smokers to continue their habit 😉