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1 revisions for "A Drop of Blood, Decades of Warning: How a Simple Test Could Reshape the Fight Against Dementia"

A landmark UC San Diego study published in JAMA Network Open found that a blood test measuring phosphorylated tau 217 (p-tau217) can predict dementia risk in women up to 25 years before symptoms appear. The finding adds to a rapidly advancing field of blood-based biomarkers that could transform Alzheimer's diagnosis from a late-stage confirmation into a decades-early warning system, though significant ethical and clinical questions remain about screening asymptomatic populations.