Vitamins and minerals
What is Selenium?
antioxidant and thyroid support
- Unit
- µmol/L
- Sample
- Serum
- Fasting
- No fasting needed
- Turnaround
- 5 days
Selenium is a trace mineral with antioxidant effects and thyroid support. Values can be low in Sweden because the soil is low in selenium.
Selenium is found in Brazil nuts, fish, eggs, and meat. Deficiency can be linked to thyroid dysfunction and weaker immunity.
What does low Selenium mean?
Low selenium can contribute to thyroid problems and reduced antioxidant defence.
What does high Selenium mean?
High selenium reflects excess supplementation and in extreme cases can be harmful.
More markers in the same area
Launching in Stockholm in 2026.
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This is general information about the marker, not an assessment of your values and not medical advice. Last updated: August 2026.