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Selenium in Nail Mass Concentration (Serum or Plasma)

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

This test measures the amount of selenium, a trace mineral important for thyroid function, immune health, and antioxidant protection, in your blood.

Quick summary

["Helps assess selenium status and potential deficiencies or excesses in your body."]

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

Key facts at a glance

LOINC
59737-7
Short code
Selenium Nail-mCnt
Synonyms
Selenium Nail-mCnt
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 like hair loss, fatigue, weakened immunity, or thyroid issues. It may also be checked in people with selenium deficiency or those taking certain supplements.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm to draw blood. It usually takes a few minutes, and you may feel a brief pinch.

What the Results Mean

Selenium levels can vary based on diet, supplements, and health conditions. Your results will be compared to standard reference ranges provided by your lab.

Common Reasons for Testing

This test is often used to diagnose or monitor selenium deficiency, especially in cases of chronic illness, malabsorption, or high selenium intake from supplements.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Selenium Deficiency vs. Toxicity

Short name

Selenium Level (Serum/Plasma)

Frequently asked questions

What causes selenium levels to be checked?
Selenium levels may be checked if you have symptoms of deficiency (e.g., fatigue, hair loss, muscle pain) or if you’re taking supplements that could affect selenium levels. It may also be monitored in people with certain medical conditions like diabetes or autoimmune disorders.
How often should I get this test?
The frequency depends on your health status and healthcare provider’s recommendations. If you have a known deficiency or are taking selenium supplements, follow their guidance for retesting.
Does diet affect selenium test results?
Yes, diet can influence selenium levels. High intake of selenium-rich foods (e.g., nuts, seafood) or supplements may temporarily alter results. Avoid extreme dietary changes before testing if advised 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