What is the reference range for Thyroid Stimulating Hormone?

The standard reference range for Thyroid Stimulating Hormone is 0.4–4.0 mIU/L (conventional). Reference ranges vary by laboratory and assay platform — interpret in context of the issuing laboratory's stated range.

Which tests measure Thyroid Stimulating Hormone?

Thyroid Stimulating Hormone is measured in 2 tests on BiomarkersLabs.com, including Complete Thyroid Panel, TSH (Thyroid Stimulating Hormone) Test.

Biomarker Reference · TSH

What does the Thyroid Stimulating Hormone test measure?

Thyroid Stimulating Hormone (TSH) is a clinical biomarker used in thyroid-endocrine assessment. TSH is produced by the anterior pituitary gland and acts as the primary regulatory signal for thyroid hormone production. It is measured in 2 laboratory tests on BiomarkersLabs.com.

Reference Range: 0.4–4.0 mIU/L (conventional)
Units: mIU/L
Measured In: 2 tests
Category: Thyroid

Functional medicine optimal1.0–2.5 mIU/L (functional range)

What is Thyroid Stimulating Hormone?

TSH is produced by the anterior pituitary gland and acts as the primary regulatory signal for thyroid hormone production. Elevated TSH indicates the pituitary is compensating for insufficient thyroid hormone (hypothyroidism); suppressed TSH indicates excess thyroid hormone (hyperthyroidism).

Why is Thyroid Stimulating Hormone measured?

First-line screening marker for thyroid dysfunction. TSH alone misses central hypothyroidism, T3 thyrotoxicosis, and subclinical presentations where Free T4 and Free T3 are needed for complete assessment.

Reference ranges

Standard reference: 0.4–4.0 mIU/L (conventional)
Functional medicine optimal: 1.0–2.5 mIU/L (functional range)
Units: mIU/L

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

Tests that measure Thyroid Stimulating Hormone

2 tests on BiomarkersLabs.com include this biomarker.

BML-THY-015Comprehensive

Complete Thyroid Panel

Thyroid Stimulating Hormone reference range in this test: 0.4–4.0 mIU/L

BML-THY-001Comprehensive

TSH (Thyroid Stimulating Hormone) Test

Thyroid Stimulating Hormone reference range in this test: 0.4–4.0 mIU/L (conventional)

Related clinical conditions

Related Biomarkers

Frequently measured alongside

Free TriiodothyronineFree T31 test Free ThyroxineFree T41 test Reverse TriiodothyronineReverse T31 test Thyroid Peroxidase AntibodiesTPO Ab1 test Antithyroglobulin AntibodiesTG Ab1 test

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