Dehydration is one of the most common illnesses among the elder population. Elders are more susceptible to dehydration encephalopathy as a result of decreased total body water. Dehydration is a contributing factor for delirium, recently demonstrated to be a strong risk factor for dementia. Water is an essential body nutrient, and its homeostasis is crucial for life. The brain consists of 80% of water, which is why staying hydrated is so important. Mental confusion, irritability, and sleepiness are frequently listed as the main alerting symptoms of dehydration and there is extensive literature dealing with dehydration and delirium in the elder population.


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