{"id":"selenium","name":"Selenium","shortName":"Selenium","aliases":["Selenium, Serum","Selenium, Plasma","Selenium, Serum or Plasma","Selenium, Serum/Plasma","Serum Selenium","Plasma Selenium","Selenium Level","Selenium (Se)","Selenium, S","Se"],"abbreviations":["Se"],"loinc":[{"code":"5724-0","primary":true},{"code":"25521-6","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"ug/L","display":"µg/L"},{"ucum":"umol/L","display":"µmol/L"},{"ucum":"ug/dL","display":"µg/dL"}],"referenceRanges":[{"population":"18+","low":110,"high":165,"unit":"ug/L","unitDisplay":"µg/L","note":"Mayo Clinic Laboratories adult interval (serum). Labs disagree widely: ARUP prints 23.0 to 190.0 µg/L for serum or plasma. The NIH Office of Dietary Supplements says 8 µg/dL (80 µg/L) or higher is usually considered sufficient in healthy people. Use the range printed on your own report.","sources":[{"title":"Selenium, Serum (test SES)","url":"https://www.mayocliniclabs.com/test-catalog/overview/9765","publisher":"Mayo Clinic Laboratories"},{"title":"Selenium, Serum or Plasma (test 0025023)","url":"https://ltd.aruplab.com/Tests/Pub/0025023","publisher":"ARUP Laboratories"},{"title":"Selenium: Fact Sheet for Health Professionals","url":"https://ods.od.nih.gov/factsheets/Selenium-HealthProfessional/","publisher":"NIH Office of Dietary Supplements"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures the trace mineral selenium in your blood, which mostly reflects how much you have recently taken in from food and supplements.","url":"https://bloodtesttracker.com/markers/selenium","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}