Selenium
A trace mineral the body uses in its own antioxidant enzymes and in activating thyroid hormone.
A trace mineral the body uses in its own antioxidant enzymes and in activating thyroid hormone.
It sits in the thyroid pathway, so a shortage can slow the conversion of T4 to T3 independently of the thyroid itself.
The window between too little and too much is narrower than for most minerals, so a high value on supplements is worth taking as seriously as a low one. Soil content varies by region, which is why intake differs so much by country.
Worth discussing a high value if you take a supplement.
On a report in another language.
A lab report names this analyte in its own language. Vitals Vault recognises each of these and files them all under Selenium.
Catalog entry last updated 2026-08-28. Browse all 165 metrics.