Increased risk of Parkinson's disease is associated with frequent consumption of dairy products. ​​

​ This study evaluated the role dietary choices play in the development of Parkinson's disease in men. Researchers studied the diets of thousands of volunteers and compared the relative risk of developing Parkinson's disease among the subjects who participated in this study. The team of researchers discovered that high consumers of dairy products had a greater risk of developing Parkinson's disease. On the other hand, no association was found between generous intake of calcium, vitamin D, and protein from other sources and Parkinson's disease risk in the study. The results of this study suggest that high dietary ingestion of dairy foods may contribute positively to the development of Parkinson's disease in men.