“But most of the environmental factors identified in this review probably represent no realistic increase or only a vanishingly tiny increased risk for dementia. A lack of Vitamin D , polluted air , exposure to some pesticides and excessive minerals in drinking water can all raise the risk of dementia , researchers have said . In a number of studies , the University of Edinburgh research team said that environmental risk factors , such as those found in pollutant - heavy areas , can contribute to the onset of dementia . A third of dementia patients ’ illness remains unexplained , leaving environmental factors as a likely cause .
A lack of Vitamin D , polluted air , exposure to some pesticides and excessive minerals in drinking water can all raise the risk of dementia , researchers have said . In a number of studies , the University of Edinburgh research team said that environmental risk factors , such as those found in pollutant - heavy areas , can contribute to the onset of dementia . A third of dementia patients ’ illness remains unexplained , leaving environmental factors as a likely cause .