Selenium in Red Blood Cells (Mass Concentration)
This test measures the amount of selenium, a mineral important for overall health, found in your red blood cells.
["Helps assess selenium status and potential deficiencies in your body."]
Key facts at a glance
- LOINC
- 52913-1
- Short code
- Selenium RBC-sCnc
- Synonyms
- Selenium RBC-sCnc
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 4.2
- Ref high
- 5.9
- Critical range
- 2 N/A – 7 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 85041
- SNOMED
- 900000000000003001
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms of selenium deficiency, such as fatigue, hair loss, or weakened immunity, or if you have conditions like chronic kidney disease or certain genetic disorders. It may also be part of a broader evaluation for nutritional deficiencies or metabolic health.
What to Expect Before the Test
No special preparation is typically needed. You may have a simple blood draw from a vein in your arm, similar to other routine blood tests. Your provider will explain the process and answer any questions you have.
What the Results Mean
Results show the concentration of selenium in your red blood cells. While reference ranges can vary by lab, lower levels may indicate a deficiency, while higher levels might suggest excess intake or certain medical conditions. Your provider will interpret the results in the context of your overall health.
Common Reasons for Testing
This test is often used to diagnose or monitor selenium deficiency, especially in individuals with dietary restrictions, malabsorption issues, or those at higher risk due to medical conditions.
Reference range
Adult males: 4.2-5.9; Females: 3.8-5.1 x 10^12/LN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Selenium is an essential trace mineral that plays a role in antioxidant protection, thyroid function, and immune support. Low levels can impair these functions, potentially leading to health issues like weakened immunity or thyroid disorders. Monitoring selenium levels helps manage these risks effectively.
Short name
Red Blood Cell Selenium Level
Frequently asked questions
What causes selenium levels to be tested?
How long does it take to get the results?
Can diet affect selenium test results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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