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Selenium in Tissue Content (Quantitative)

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

This test measures the amount of selenium present in your body tissues, an essential mineral involved in antioxidant protection and thyroid function.

Quick summary

["Selenium helps support immune health and may reduce oxidative stress in your body."]

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

Key facts at a glance

LOINC
52889-3
Short code
Selenium Tiss-sCnt
Synonyms
Selenium Tiss-sCnt
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 recommend this test if you have symptoms or conditions linked to selenium deficiency, such as fatigue, hair loss, or weakened immunity. It could also be part of a broader evaluation for thyroid disorders, autoimmune diseases, or nutritional deficiencies.

What to Expect Before the Test

No special preparation is typically needed. If a blood sample is drawn, you may experience mild discomfort, but no fasting is required for this test.

How the Results Are Interpreted

Results are compared to general reference ranges for selenium in tissues, though individual ranges can vary. Low levels may indicate deficiency, while very high levels could suggest toxicity or other underlying conditions.

Common Conditions or Symptoms Linked to Selenium Levels

Low selenium levels may contribute to conditions like hypothyroidism, weakened immune function, or muscle weakness. High levels can sometimes be associated with selenium toxicity, though this is rare with normal dietary intake.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Selenium Level (Tissue)

Frequently asked questions

What causes selenium levels to be checked?
Your provider might check selenium levels if you have symptoms of deficiency (e.g., fatigue, hair loss) or if you have conditions like autoimmune diseases, thyroid disorders, or poor dietary intake of selenium-rich foods (e.g., nuts, seeds, seafood).
How often should I get this test?
This test is usually not routine unless recommended by your healthcare provider for specific symptoms or conditions. Follow-up may depend on your overall health and test results.
Can diet affect selenium levels?
Yes, diet plays a key role. Foods like Brazil nuts, fish, and whole grains are good sources of selenium. If you suspect a deficiency, discuss dietary changes with 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