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Interleukin-3 (IL-3) Mass Concentration in Serum

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

This test measures the amount of interleukin-3, a protein involved in stimulating the production of white blood cells, in your blood serum. It may be used to assess immune function or evaluate certain blood disorders.

Quick summary

["IL-3 helps regulate your immune system and blood cell production."]

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

Key facts at a glance

LOINC
70079-9
Short code
Il3 SerPl-mCnc
Synonyms
Il3 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

Why This Test Might Be Ordered

Your healthcare provider may order this test if you have symptoms or conditions related to immune system dysfunction, such as low white blood cell counts, certain cancers, or chronic inflammatory diseases. It could also be part of monitoring for blood disorders like leukemia or lymphoma.

What to Expect Before the Test

No special preparation is typically needed. You may have a small needle inserted into your arm to draw blood. If you’re on blood thinners or have a history of bleeding disorders, let your provider know beforehand.

What the Test Results Mean

Results are interpreted by your healthcare provider based on your medical history and symptoms. Elevated levels might suggest immune activation, while lower levels could indicate immune suppression or certain blood disorders. Results alone don’t diagnose conditions—your provider will consider the full clinical picture.

Common Conditions Monitored

IL-3 levels are less commonly monitored in routine care but may be checked in research settings or specialized clinical scenarios involving immune-related diseases or stem cell transplants.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IL-3 Serum

Frequently asked questions

What causes IL-3 levels to be tested?
IL-3 testing is rare in routine care but may be considered in research studies, specialized immune disorders, or when evaluating blood cell production disorders like aplastic anemia or myelodysplastic syndromes.
Is there any risk or discomfort with this test?
Minimal discomfort is possible from the needle insertion, similar to other blood draws. Rarely, there may be mild bruising or soreness at the site.
Can I eat or drink before this test?
No dietary restrictions apply. You can eat and drink normally before the test unless instructed otherwise by your provider.
  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