The overwhelming majority of Alzheimer's disease cases occur in older patients. While about a small percentage of cases involve younger patients, most people with Alzheimer's are over the age of 65. In addition to the effects of age on the brain, other health problems and increased isolation can contribute to a higher risk of developing the disease in old age. At times, it can seem difficult to distinguish between age-related changes in memory and brain function and the onset of Alzheimer's. However, Alzheimer's is a much more severe condition that goes beyond temporary lapses in memory, and it requires additional care.

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