From the online version of The New Scientist: Do coffee and cigarettes protect against Parkinson's?
People with Parkinson's disease are less likely to be smokers and coffee drinkers than their healthy siblings, according to a study of family members. The finding adds to a growing body of evidence that some substance in tobacco might protect the brain against this devastating neurological disorder and sheds new light on coffee's effects on the disease.
Researchers say the study provides new evidence that the causes of Parkinson's vary. They also stress that the negative health effects of smoking far outweigh any protective effect the substance might have against this neurodegenerative disease.