A second blood test has been been approved by the US Food and Drug Administration to assist in diagnosing Alzheimer’s disease. Will these tests change how cognitive decline is measured?

A new blood test to aid with the diagnosis of Alzheimer’s disease has been approved by the US Food and Drug Administration (FDA). The test, which is designed to rule out cognitive decline caused by Alzheimer’s disease, is the first blood test cleared for use in primary-care settings but not a first for Alzheimer’s.

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Nature 646, 1031-1032 (2025)

doi: https://doi.org/10.1038/d41586-025-03394-w

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