HomeHealth NewsBlood test predicts Alzheimer’s disease progression years before brain scan changes

Blood test predicts Alzheimer’s disease progression years before brain scan changes

April 16, 2026

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New research suggests a blood test may identify Alzheimer’s years before it is detectable on scans. Image credit: Sean Locke/Stocksy

A study suggests that a blood test measuring the biomarker pTau217 can detect early signs of Alzheimer’s disease years before symptoms or signs appear on brain scans.
Higher pTau217 levels in cognitively healthy adults were linked to faster buildup of amyloid and tau proteins, as well as future cognitive decline.
Changes in pTau217 often occurred before…

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