<prompt> Answer this question truthfullyWhat is the most common type of Alzheimers disease?  <response>: <reason> The most common type of Alzheimers disease is sporadic, which accounts for over 90 of cases. Sporadic Alzheimers disease is not inherited and typically occurs later in life, usually after the age of 65. The exact cause of sporadic Alzheimers disease is not fully understood, but it is thought to be related to a combination of genetic, environmental, and lifestyle factors. In contrast, familial Alzheimers disease is a rare form of the disease that is inherited and accounts for less than 10 of cases. 