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A new Blood test has shown promise at detecting Alzheimer's years before a patient shows any symptoms.

So far the test seems very accurate, but the initial trials need to be scaled up and more testing needs to be done.

New Blood Test Accurately Predicts Alzheimer's Years Ahead of First Symptoms

A new type of blood test can detect a hidden toxin behind Alzheimer's disease years before a patient shows any symptoms of memory loss or confusion.