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New Blood Test Predicts Alzheimer's Onset Within Years

2/19/2026

Summary

Story summary

Washington University School of Medicine researchers developed a blood test measuring p-tau217 to predict Alzheimer’s symptoms onset within three to four years.
The study analyzed blood samples from over 600 cognitively healthy adults.
The findings, published in Nature Medicine, indicate potential for early interventions and trials.
Experts caution that the test is not yet suitable for asymptomatic individuals.
Further refinement is needed to improve accuracy and applicability in clinical settings.

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Story summary

Washington University School of Medicine researchers developed a blood test measuring p-tau217 to predict Alzheimer’s symptoms onset within three to four years.
The study analyzed blood samples from over 600 cognitively healthy adults.
The findings, published in Nature Medicine, indicate potential for early interventions and trials.
Experts caution that the test is not yet suitable for asymptomatic individuals.
Further refinement is needed to improve accuracy and applicability in clinical settings.