Feel like your head is spinning? Like a little blood sample in a centrifuge, perhaps? No need to panic. It just means you are straining, like the rest of us, to keep up with the Alzheimer's disease plasma biomarker development field. New markers, new assays, new protocols seem to arrive at a dizzying pace.

Experts have raised concerns about Quest Diagnostics’ $399 consumer-initiated Alzheimer’s disease test, telling 360Dx that it is unclear whether the product is accurate enough to support its use

The first direct-to-consumer Alzheimer’s disease blood test has arrived. Quest Diagnostics, a worldwide diagnostic service headquartered in Secaucus, New Jersey, announced on July 31 that it would market a plasma Aβ42/ Aβ40 Alzheimer’s test to the public.