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A clinical trial is a research study performed in people that is aimed at evaluating a medical, surgical, or behavioral intervention. Most clinical trials test a new treatment to find out if it is safe and effective in people. There are many reasons people choose to join a clinical trial. Learn more about the benefits of participating in clinical research. 

Looking for Alzheimer's disease and related dementias clinical trials? Visit our clinical trials finder


What Are Clinical Trials and Studies?

Interested in clinical research? Learn about the difference between clinical studies and clinical trials, and the phases of clinical trials for FDA approval.
Female researcher looking at a brain scan

Why Are Placebos Important?

In undertaking a clinical trial, researchers don’t want to leave anything to chance. The “gold standard” for testing interventions in people is the “randomized, placebo-controlled” clinical trial.
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Registries and Matching Services

How can you help Alzheimer’s and other dementia/brain research? Join a registry or matching service. NIH and others match volunteers with clinical studies.
Older woman looking at clinical trials information online with her doctor