Blood Test May Predict Alzheimer’s Risk a Decade Before Symptoms

A major international study has shown that a simple blood test can predict Alzheimer’s‑related cognitive decline up to ten years before symptoms appear. The test identifies individuals at highest risk, who face a 38 % chance of impairment within five years and a 78 % chance within ten years. Researchers say the findings could enable earlier intervention and guide the development of treatments aimed at preventing Alzheimer’s before memory problems start. The study’s results suggest that routine blood screening could become a standard tool for identifying people who would benefit most from preventive strategies. By detecting risk early, clinicians could monitor patients more closely, adjust lifestyle factors, and enroll them in clinical trials targeting pre‑symptomatic stages of the disease.