For the first time, people worried about their risk of Alzheimer’s disease can go online, order a blood test, and receive results in the privacy of their homes.
This might seem appealing on the surface, but the development has Alzheimer’s researchers and clinicians up in arms. The Quest Diagnostics blood test, AD-Detect, measures elevated levels of amyloid-beta proteins, a signature characteristic of Alzheimer’s. Introduced in late July, the test is targeted primarily at people 50 and older who suspect their memory and thinking might be impaired and people with a family history of Alzheimer’s or genetic risks for the condition.
Amyloid in the brain accumulates slowly over the course of decades, typically beginning in middle age, and becomes more common as people age. “This test gives you a fuzzy answer. We don’t know whether you’re going to get dementia, or when symptoms might begin, or, really, how high the risk is for any individual,” said Meera Sheffrin, medical director of the Senior Care clinic at Stanford Healthcare.
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