The results of research in this area are very inconclusive, and most epidemiologic studies have shown that non-smokers are more likely to develop Parkinson’s disease than smokers. There has been some recent research suggesting that cigarette smoke contains a derivative of naphthoquinone, an inhibitor of a biological enzyme in the body called monoamine oxidase, which has been linked to the prevention of Parkinson’s disease. If the results of this study are eventually confirmed, then we may get a new preventive drug for Parkinson’s disease. Another recent research study reported that people who enjoy drinking coffee for a long time have less chance of developing Parkinson’s disease. Some scholars believe that foods rich in vitamin E, coffee, niacin, nuts, English fruits and potatoes may reduce the chance of developing the disease. Animal fats may increase the risk of Parkinson’s disease.