A blood test can predict the risk of dementia in women up to 25 years before symptoms appear, researchers say. Experts in the US found that higher levels of a protein called p-tau217 – which is linked ...

UC San Diego researchers found a blood-based biomarker can predict a woman's risk of developing dementia as many as 25 years before symptoms appear, according to a paper published Tuesday.

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Experts in the US found that higher levels of a protein called p-tau217 were an accurate predictor of people developing cognitive problems and dementia.

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Women with higher levels of p-tau217, a blood protein, were twice as likely to eventually develop dementia or mild cognitive impairment.

Scientists found that a blood protein called p tau217 may reveal dementia risk up to 25 years before symptoms appear.