The A4 study: Now is the time to join the fight to prevent Alzheimer's disease.
A4 study is a landmark clinical trial to prevent the memory loss associated with Alzheimer's disease.

You May Be Eligible

Exciting news! Participants in the Study have met the following criteria. If you have any questions regarding these requirements, contact the A4 Study today.
The A4 Study has site locations in the United States, Canada, and Australia. Using the map of study site locations, search the listings or enter your zip code to find the nearest site location to you.

Find Nearby Site Locations

Watch the A4 Study Video
Hear directly from Dr. Reisa Sperling and other Alzheimer’s disease experts explain the A4 study, share what makes the A4 study so unique, and why now is the time to participate.

Watch the A4 Study Video