The test works by measuring proteins beta-amyloid and p-tau217, which are believed to be hallmarks of Alzheimer’s disease. Alzheimer's is a degenerative brain disease that is caused by complex ...

Its mouthful of a name — Lumipulse G pTau217/ß-Amyloid 1-42 Plasma Ratio — describes what the test measures: levels of two proteins, amyloid and tau, that are hallmarks of Alzheimer’s disease.

A ratio of those proteins tends to correlate with the occurrence or absence of amyloid plaques in the brain, which are among the hallmarks of Alzheimer’s disease. The test does not measure ...