What is the reference range for Selenium (Blood)?

The standard reference range for Selenium (Blood) is ZRT laboratory-specific; approximately 70–150 µg/L, varies by geography and dietary intake.. Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Which tests measure Selenium (Blood)?

Selenium (Blood) is measured in 2 tests on BiomarkersLabs.com, including Blood Spot + Dried Urine ICPMS Toxic and Essential Elements, Comprehensive Blood Elements.

Biomarker Reference · Se

What does the Selenium (Blood) test measure?

Selenium (Blood) (Se) is a clinical biomarker used in heavy-metals-toxicology assessment. Selenium is an essential trace element incorporated into selenoproteins, including glutathione peroxidases and thioredoxin reductases that protect against oxidative stress. It is measured in 2 laboratory tests on BiomarkersLabs.com.

Reference Range: ZRT laboratory-specific; approximately 70–150 µg/L, varies by geography and dietary intake.
Units: µg/L, µmol/L
Measured In: 2 tests
Category: Heavy Metals

Functional medicine optimalObservational data suggest 120–150 µg/L may optimise selenoenzyme activity and associate with lower cancer and cardiovascular risk, though randomised supplementation trials have not confirmed benefit at the population level.

What is Selenium (Blood)?

Selenium is an essential trace element incorporated into selenoproteins, including glutathione peroxidases and thioredoxin reductases that protect against oxidative stress. It is also required for thyroid hormone metabolism via the iodothyronine deiodinases. Both deficiency (Keshan cardiomyopathy, Kashin-Beck osteoarthropathy) and toxicity (selenosis: hair loss, nail changes, neurological symptoms) are recognised.

Why is Selenium (Blood) measured?

Blood selenium reflects recent dietary intake and is used to assess selenium status in populations with marginal intake, in total parenteral nutrition, and when toxicity is suspected. Serum or plasma selenium correlates reasonably with tissue stores; red-cell selenium reflects longer-term status.

Reference ranges

Standard reference: ZRT laboratory-specific; approximately 70–150 µg/L, varies by geography and dietary intake.
Functional medicine optimal: Observational data suggest 120–150 µg/L may optimise selenoenzyme activity and associate with lower cancer and cardiovascular risk, though randomised supplementation trials have not confirmed benefit at the population level.
Units: µg/L, µmol/L

Reference ranges vary by laboratory and assay platform. Interpret in context of the issuing laboratory's stated range.

Tests that measure Selenium (Blood)

2 tests on BiomarkersLabs.com include this biomarker.

BML-HMT-009Comprehensive

Blood Spot + Dried Urine ICPMS Toxic and Essential Elements

Selenium (Blood) reference range in this test: ZRT laboratory-specific; approximately 70–150 µg/L, varies by geography and dietary intake.

BML-HMT-013Comprehensive

Comprehensive Blood Elements

Selenium (Blood) reference range in this test: Approximately 70–150 µg/L; varies by geography and dietary intake.

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Mercury (Blood)Hg3 tests Lead (Blood)Pb3 tests Cadmium (Blood)Cd4 tests Zinc (Blood)Zn3 tests Copper (Blood)Cu3 tests Chromium (Blood)Cr(III)/Cr(VI)3 tests Molybdenum (Blood)Mo2 tests Arsenic (Urine)As3 tests

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