New Blood Test Can Detect Alzheimer's Disease 20 Years Before Symptoms

A simple blood test can now detect the earliest signs of Alzheimer's disease long before memory problems appear. ## How It Works The test measures specific proteins and biomarkers that increase when Alzheimer's-related brain changes begin, typically decades before symptoms. ## Clinical Validation In trials involving 10,000 participants, the test predicted Alzheimer's development with 94% accuracy up to 20 years in advance. ## Treatment Implications Early detection enables intervention when treatments are most effective, potentially preventing or delaying the onset of symptoms. ## Screening Potential The test could become a routine screening tool for people over 50, fundamentally changing how we approach neurodegenerative disease.