• Most individuals are currently diagnosed with Alzheimer’s disease only after cognitive decline has set in and brain damage has become irreversible.
• Alterations in brain metabolism and blood flow to the brain can be identified in the early stages of Alzheimer’s disease, before the onset of significant brain damage.
• A recent study identified specific patterns of alterations in brain metabolism and cerebral blood flow in brain regions affected by Alzheimer’s disease, which could allow for earlier diagnosis.

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Written by Deep Shukla on November 17, 2025

Fact checked by Jill Seladi-Schulman, Ph.D.