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Serum or plasma concentration of albumin

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of albumin, a protein found in your blood that helps maintain fluid balance and supports immune function.

Quick summary

["Albumin helps keep tissues hydrated and supports blood clotting and immune responses."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
871-4
Short code
Deprecated A3 B Ab Ser Ql
Synonyms
Deprecated A3 B Ab Ser Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
aggl-rbc
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your healthcare provider may order an albumin test to check for conditions like malnutrition, kidney disease, liver problems, or chronic inflammation. It can also help assess how well your body is retaining fluids or if you have protein-losing disorders.

What Does a Low Albumin Level Indicate?

Low albumin levels may suggest poor nutrition, liver or kidney disease, severe infections, or conditions that cause excessive fluid loss (like burns or diarrhea). Very low levels can lead to swelling (edema) or other complications.

What Does a High Albumin Level Indicate?

High albumin levels are less common but may occur in dehydration, certain genetic disorders, or in response to stress (e.g., severe illness). They’re usually not harmful unless caused by an underlying condition.

How Is This Test Performed?

A blood sample is drawn from a vein in your arm. The sample is sent to a lab where albumin is measured using an immunoassay or similar method. Results are reported as a concentration in grams per deciliter (g/dL).

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Albumin Level

Frequently asked questions

What does an abnormal albumin test mean?
An abnormal result doesn’t always mean a serious problem, but it may signal a need for additional tests or lifestyle changes to address potential causes like diet, illness, or organ dysfunction. Always discuss results with your healthcare provider.
How can I prepare for this test?
No special preparation is usually needed, but avoid heavy meals or alcohol before the blood draw. If you’re on dialysis or have kidney disease, let your provider know to ensure the test is interpreted correctly.
Can diet affect albumin levels?
Yes, diet plays a role—low protein intake can lower albumin, while adequate protein may help maintain normal levels. If you suspect dietary issues, talk to your doctor or dietitian for guidance.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy