Scientists have developed a blood test that could predict Alzheimer's symptoms years in advance using p-tau217 protein levels ...

When doctors suspect Alzheimer's, they can order a blood test to learn whether a patient's brain contains the sticky amyloid plaques that are a hallmark of the disease. But the results of that test ...

A new study suggests that older adults with lower levels of vitamin B12—even within the normal range—may experience cognitive decline and brain damage. Researchers found that these people had slower ...

Strokes are a medical emergency, yet imaging can capture only snapshots of how brain damage develops in the hours and days that follow. For many other organs, blood tests can indicate acute injury, ...