Alzheimer’s disease has a cruel timeline. Changes in the brain can start years before anyone forgets a name or loses their way home.
By the time symptoms show up, a lot has already happened under the hood, and that makes prevention hard.
That’s why a simple blood draw has people paying attention. A new approach uses one blood test to estimate when a person is likely to begin showing Alzheimer’s symptoms.
A clock hidden in the blood
The work comes from researchers at Washington University School of Medicine in St. Louis. Their models predicted the onset of Alzheimer’s symptoms within a margin of three to four years.
In a field where timing usually involves expensive brain scans or spinal taps, that level of forecasting from blood is a big shift.
The idea centers on a protein called p-tau217 found in…