[Relation between mercury and Alzheimer's disease?].

Mercury from dental silver amalgam has been suggested to be linked with Alzheimer's disease. The percentage in the population (formerly) possessing amalgam restorations exceeds that of Alzheimer patients. Therefore, low levels of mercury in the brain are unlikely to cause the disease. However, studies indicating increased levels of mercury in Alzheimer brains compared to controls have been criticised. In contrast, it has been proven that an inherited trait accounts for a minor proportion of Alzheimer's patients. Moreover, education--or related psychosocial factors--instead of amalgam has been found to be associated with the disease. Therefore, it does not seem warranted as yet to conclude that mercury is an etiological factor in Alzheimer's disease.