Science

A simple blood test could reveal Alzheimer’s risk 10 years before symptoms

A major international study found that a simple blood test could help predict Alzheimer’s-related cognitive decline years before symptoms appear, with the highest-risk individuals facing a 38% chance of impairment within five years and an estimated 78% chance within 10 years.

✦ Extractive summary — built from the sources' own reporting•From 1 source•1 min read•Updated October 31, 2026, 12:59 AM UTC

Scientists believe the discovery could pave the way for earlier intervention and future treatments designed to prevent Alzheimer’s before memory problems begin.

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