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.

Prealbumin

Print this article
Share this page:
Also known as: Thyroxine-binding Prealbumin
Formal name: Transthyretin
Related tests: C-Reactive Protein

The Test Sample

What is being tested?

Prealbumin, also called transthyretin, is one of the major proteins in the blood and is produced primarily by the liver. Its functions are to carry thyroxine (the main thyroid hormone) and vitamin A throughout the body. This test measures the level of prealbumin in the blood.

Although commonly used as a marker of malnutrition, research is continuing in order to better understand the role(s) of prealbumin in the body, especially the reasons for changes observed during illness, and the clinical utility of prealbumin testing.

How is the sample collected for testing?

A blood sample is taken by a needle from a vein in the arm.

NOTE: If undergoing medical tests makes you or someone you care for anxious, embarrassed, or even difficult to manage, you might consider reading one or more of the following articles: Coping with Test Pain, Discomfort, and Anxiety, Tips on Blood Testing, Tips to Help Children through Their Medical Tests, and Tips to Help the Elderly through Their Medical Tests.

Another article, Follow That Sample, provides a glimpse at the collection and processing of a blood sample and throat culture.

Is any test preparation needed to ensure the quality of the sample?

No test preparation is needed.