Researchers have identified nine risk factors associated with as many as two-thirds of all cases of Alzheimer's disease. (Video via the National Institutes of Health)
These include obesity, carotid artery narrowing, low educational attainment, depression, high blood pressure, frailty, smoking habits, high levels of certain naturally occurring amino acids, and Type 2 diabetes in the Asian population.
Researchers determined these risk factors after analyzing existing results from more than 300 studies.
The direct causes of Alzheimer's are still not fully understood, and the researchers emphasize "what is seen here is an association rather than a direct cause-and-effect relationship between any one factor and Alzheimer's risk."
But they say catching and addressing any of these warning signs early "may decrease new incidence of [Alzheimer’s disease]."
But in their analysis, the researchers did identify factors that could help reduce the risk of the disease, including estrogen treatments, certain high blood pressure medications and coffee. (Video via CBS)
This video includes images from Getty Images.