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Simple finger prick test can diagnose Alzheimer's

By Newsweek  
   January 06, 2026

Alzheimer's disease affects millions worldwide—but confirming a diagnosis is far from simple. Doctors currently rely on costly brain scans or invasive spinal fluid tests to identify the condition—methods that can be stressful, time-consuming and out of reach for many patients. Now, researchers say a simpler approach could be on the horizon: just a quick prick of a patient's fingertip might one day help doctors detect the disease, which affects an estimated 7.2 million Americans age 65 and older.

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