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Serum Albumin (Total Protein Component)

Published: August 9, 2026Updated: August 17, 2026

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

Quick summary

["Albumin levels can indicate overall protein status and potential health risks."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
102888-5
Short code
Swine Serum Alb IgE RAST
Synonyms
Swine Serum Alb IgE RAST
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
rast
CPT
84484
SNOMED
302774002
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 Does in Your Body

Albumin is essential for transporting nutrients, hormones, and medications in your bloodstream. It also helps maintain blood pressure by controlling fluid distribution between blood vessels and tissues. Low levels may suggest conditions like malnutrition, kidney disease, or liver problems.

Why It’s Tested

Doctors may order albumin tests to check for protein loss (e.g., due to kidney disease), liver function, or nutritional deficiencies. It’s also used in monitoring chronic conditions like heart failure or cirrhosis.

Common Reasons for Testing

Albumin testing is often done when symptoms like swelling, fatigue, or unexplained weight loss appear. It may also be part of routine checks for patients with chronic illnesses or those recovering from surgery.

What to Expect Before the Test

No special preparation is needed, but you may fast for 8–12 hours before the draw if your doctor specifies. Wear comfortable clothing for easy access to your arm.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Albumin Level

Frequently asked questions

Why might my albumin levels be important?
Low albumin can signal serious underlying issues like kidney disease, liver failure, or severe infections. High levels may rarely indicate dehydration or certain blood disorders. Your doctor will interpret results in context with your symptoms and medical history.
How do I prepare for follow-up results?
Your doctor will discuss results during your visit, explaining any changes and next steps. If you have questions, ask your provider about what to watch for or how to manage any findings.
Can diet affect albumin levels?
Dietary protein intake can influence albumin levels, but results depend on overall health. Your doctor may recommend dietary adjustments if malnutrition is suspected, but avoid self-diagnosing based on test results alone.
  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 17, 2026. · Read our editorial policy