Blood protein p-tau217 detects Alzheimer's up to 10 years before symptoms

Scientists at the Mass General Brigham Neuroscience Institute analysed medical data from over 2,600 healthy older adults in North America, Japan and Australia, tracking samples dating back to 2004. They found that elevated levels of the protein p-tau217 in the blood of symptom-free individuals strongly predicts cognitive decline and the onset of Alzheimer's disease up to ten years before symptoms appear. The findings were published in the journal JAMA.

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