Simple Blood Test May Predict Alzheimer's-Related Cognitive Decline Years Before Symptoms

AI-generated NewsSnap summary based on source reporting.
Published: 2026-10-31
Category: health
Source: ScienceDaily (citing Mass General Brigham and JAMA)

A large international study, published in JAMA and led by Mass General Brigham, indicates that a simple blood test measuring phosphorylated tau 217 (p-tau217) could identify individuals at high risk of Alzheimer's-related cognitive decline up to a decade before symptoms appear.

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