Quest Diagnostics launches Alzheimer’s blood test

Quest Diagnostics on Monday launched the first direct-to-consumer blood test to detect abnormal levels of beta amyloid, a key Alzheimer’s protein which can appear years before dementia symptoms arise.
The $399 test, called AD-Detect, uses the same technology as a blood test the company launched for use by doctors in early 2022.
The announcement follows full U.S. regulatory approval earlier this month of Leqembi, a drug from Eisai and partner Biogen that removes amyloid from the brain and has been shown to slow the advance of Alzheimer’s in early-stage patients.
A similar treatment from Eli Lilly called donanemab is under review by the U.S. Food and Drug Administration. Prior Alzheimer’s treatments have only treated symptoms but did not address the underlying disease.