Proceeds from website advertising help sustain Lab Tests Online. AACC is a not-for-profit organization and does not endorse non-AACC products and services.


Print this article
Share this page:
Also known as: Alzheimer Biomarkers
Formal name: Tau Protein and Amyloid Beta 42 Peptide
Related tests: Phosporylated Tau (P-tau), APOE Genotyping, PSEN1

At a Glance

Why Get Tested?

To help distinguish between Alzheimer disease and other forms of dementia

When to Get Tested?

These tests may be ordered along with cognitive and brain-imaging tests in people who demonstrate some form of dementia. These tests are not routine laboratory tests and are typically available only in research settings or memory clinics.

Sample Required?

A sample of cerebrospinal fluid collected using a spinal tap

Test Preparation Needed?

Your health practitioner will advise you of any preparatory requirements.