Caffeine has already shown benefits in lowering a person's chances of acquiring Parkinson's disease.
Canadian researchers used 61 patients suffering from Parkinson's disease for the 6 week study, and gave half the patients two to four cups of caffeinated coffee a day.
The remaining patients were giving placebos with no caffeine.
Those drinking caffeinated coffee averaged a five point reduction in symptom severity.
There was no positive outcome for the group that did not take caffeine.