Tau is a protein that clumps together and forms "tangles" in the brains of people who have Alzheimer’s, per Healthline. These tangles interfere with cognitive function. Tau tangles typically ...

“This blood test clearly identifies Alzheimer’s tau tangles, which is our best biomarker measure of Alzheimer’s symptoms and dementia,” co-senior author Randall J. Bateman, MD, said in a ...

A new blood-based test reflected Alzheimer's tau tangle pathology. The assay measured a new plasma tau species known as endogenously cleaved MTBR-tau243. The test distinguished various stages of ...