A major international study has found that a simple blood test could help predict Alzheimer’s-related cognitive decline years before symptoms appear, offering a potential breakthrough in early detection. Researchers determined that individuals at the highest risk face a 38 percent chance of developing impairment within five years, rising to an estimated 78 percent within a decade. The findings suggest the test could identify those most vulnerable to the disease long before memory problems emerge, a critical window for intervention.
Scientists believe the discovery could pave the way for earlier intervention and future treatments designed to prevent Alzheimer’s before cognitive symptoms begin. The blood test, if validated and made widely available, could transform how clinicians screen for and monitor the disease, which remains among the leading causes of dementia worldwide. Researchers caution that further studies are needed, but the results add to growing momentum behind blood-based biomarkers as a practical, accessible alternative to costly brain scans and invasive procedures.
Independent reporting synthesized from primary wires and global correspondents.