Blood Test Detects Alzheimer's Decades Early

New research published in The Lancet suggests that a simple blood test can detect Alzheimer s disease decades before symptoms appear by measuring amyloid and tau proteins. A study led by the University of California, San Francisco, primarily funded by the United States — National Institutes of Health, found that elevated biomarkers in midlife were associated with worse cognitive performance. Separately, the University of Pittsburgh School of Medicine developed a new brain imaging test (MK6240) that detects tau protein tangles earlier than existing methods. Experts like Kristine Yaffe and Jacqui Hanley highlight the value of early detection for preventive strategies and clinical trials. While the United States — Food and Drug Administration has approved blood tests for symptomatic patients, caution is urged by Anil Venkitachalam regarding routine population-wide screening due to potential false positives. Initiatives like the Blood Biomarker Challenge, led by the Alzheimer s Society, Alzheimer s Research UK, and the United Kingdom — National Institute for Health and Care Research, aim to make these blood tests available on the United Kingdom — National Health Service by 2029.