Summary: Environmental factors have a substantial impact on the development of Parkinson's and Alzheimer's disease, and risk levels can be dramatically reduced. These factors include dietary patterns, toxic chemical exposures, inadequate exercise, and socio-economic stress. It is also suggested that these factors alter the biochemical pathways in cells, which fuels not only Alzheimer's and Parkinson's diseases but other chronic conditions such as diabetes, obesity, cardiovascular disease, and metabolic syndrome.

Comment: "It is clear from these findings that our activities in the areas of food and agriculture, energy, chemical use, and social organization are key drivers in the abnormal loss of neurological function in older people throughout the modern world," says Jill Stein, MD, Greater Boston Physicians for Social Responsibility. This report can help elderly people prevent neurological disorders by reducing environmental risk factors.