The A4 study: Now is the time to join the fight to prevent Alzheimer's disease.

Welcome to the A4 Study

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

A4 Study Organizers

The A4 Study is a landmark public-private partnership, funded by the National Institute on Aging/NIH, Eli Lilly and Company, and several philanthropic organizations. The A4 trial is coordinated by the University of Southern California’s Alzheimer’s Therapeutic Research Institute, with study sites in multiple locations.

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a4 study results