A study from UCSF suggests that a simple blood test could identify individuals at higher risk of Alzheimer’s disease before symptoms appear. Researchers found links between certain proteins in the blood and cognitive differences in middle-aged adults without dementia. The study indicates that early detection through blood tests could lead to timely interventions, although it is not yet suitable for screening. Current diagnostic methods, like MRI scans, are expensive and not always accessible. The findings highlight the potential for blood tests to improve early diagnosis and management of Alzheimer’s risk.