Alzheimer’s disease (AD) is the most common form of dementia in those over the age of 65. As many as 5 million Americans age 65 and older may have AD, and that number is expected to double for every 5-year interval beyond age 65. But Alzheimer’s is only one of many dementia disorders; another 1.8 million people in the U.S. have some other form of dementia.

Age is the primary risk factor for developing dementia.

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