What Alzheimer’s blood tests currently measure
Measuring levels of both amyloid and tau is key to understanding and diagnosing Alzheimer’s and other forms of dementia.
This illustration depicts cells in an Alzheimer’s affected brain. The brown areas depict beta-amyloid protein plaques. The blue areas represent tau proteins that accumulate and form tangles. – NIH/AP
Amyloid plaques play a key role in the development of Alzheimer’s when small clusters gather at synapses in the brain and interfere with the nerve cells’ ability to communicate. Such plaques are thought to trigger changes in tau proteins, which form into tangles in parts of the brain controlling memory
Source Yahoo, 4/8/2025