Human population studies found that those who smoke are less likely to develop the disease.
Even passive smoking, which involves much less exposure to nicotine, seems to be protective.
Parkinson's is a progressive condition in which damage to brain cells eventually leads to tremors, rigidity and slow movement, and there is currently no cure.
Nicotine is believed to lower down the chances of a person to have Parkinson's disease in the future. This chemical substance found in cigarettes and tobaccos prevents the kind of nerve damage seen in Parkinson's.
A newer study also proposes that eating vegetables containing an edible form of nicotine can ultimately protect against the condition. Examples of these foods are tomatoes, potatoes, aubergines, and peppers.
Among those veggies that are mentioned, eating peppers twice a week could help reduce the risk of developing Parkinson's disease by up to a third.