What is this test?
Albumin is the main protein made by the liver and helps keep fluid in the bloodstream and transport many substances. Levels are affected by inflammation, liver production, kidney or gut loss and hydration.
Why might it be ordered?
- To assess liver, kidney, inflammatory or nutritional concerns.
- To investigate swelling or monitor a long-term illness.
What sample is needed?
A blood sample is required. The laboratory chooses the correct tube and handles the sample for this test.
How should you prepare?
Ask the laboratory whether you need to fast or attend at a particular time. Do not stop or change medicines or supplements unless your clinician tells you to.
How should you understand the result?
Low albumin is common in many illnesses and does not by itself prove malnutrition or liver failure. The cause is assessed with other blood and urine findings.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.