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Albumin (Serum or Plasma Mass Concentration)

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 fluids where they belong and supports your body’s defenses."]

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

Key facts at a glance

LOINC
14338-8
Short code
Prealb SerPl-mCnc
Synonyms
Prealb SerPl-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

What Albumin Measures

Albumin is a key protein in your blood that helps regulate fluid balance by preventing fluid from leaking out of blood vessels into tissues. It also carries important substances like hormones and medications. Low levels may indicate problems like kidney disease, malnutrition, or liver issues, while high levels could suggest dehydration or certain medical conditions.

Why It’s Done

Doctors may order albumin tests to check for kidney function, liver health, or nutritional status. It’s often part of a broader blood panel to monitor chronic conditions like heart disease or diabetes.

Common Reasons for Testing

Common reasons include assessing kidney function, diagnosing liver disease, evaluating malnutrition, or monitoring chronic illnesses like heart failure or kidney disease.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for a few hours if your blood is drawn early in the morning. Wear a loose shirt for easy access.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Albumin Level

Frequently asked questions

How long does it take to get results?
Results are typically available within 1–3 business days, depending on your lab. Follow-up with your healthcare provider if you have concerns about your results.
Can diet affect albumin levels?
Diet can influence albumin levels indirectly. Poor nutrition (e.g., low protein intake) may lower albumin, while dehydration could raise it. Always discuss dietary changes with your doctor.
Is albumin testing painful?
The test involves a small needle inserted into your arm, causing brief discomfort. Most people tolerate it well, and the site may bruise slightly afterward.
  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