LabTestSuperstore.
Range Atlas

AI-collected, not medically reviewed. Compare source context, not your health status.

Choose the units printed on your report.

Thyroid stimulating hormone (TSH): ranges and targets

6 sources / 6 ranges · mIU/L

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Categories and treatment goals are not interchangeable. Blank chart areas do not mean normal. Display values are rounded.

Shared scale (mIU/L)

02.55

Laboratory reference intervals

Cleveland Clinic

Source reference interval

United States · Any sex · adult

Adult TSH reference range (21 to 99 years).

0.27 to 4.2 mIU/L

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Source details: Cleveland Clinic, Source reference interval
Native values:
0.27 to 4.2 mIU/L
Context:
Adult TSH reference range (21 to 99 years).
Population / collection / assay:
any; adult. Adult TSH reference range (21 to 99 years). Any additional details not recorded here remain unspecified.
Source date/version:
Not recorded
Last verified in this pass:
Not rechecked. Recorded access: 2026-06-11.
Verification:
verified_numeric_source. Inherited extraction, not rechecked in the September 20 pass. Endpoint inclusion, source version and any context absent from the original record remain unverified.
Endpoint inclusion is not verified. A boundary label does not imply ≤ or ≥.
Locator:
Original source link and basis note
Read Cleveland Clinic (new tab)

Oxford University Hospitals

Source reference interval

United Kingdom · Any sex · adult

UK NHS laboratory reference interval for adults.

0.35 to 4.94 mIU/L

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Source details: Oxford University Hospitals, Source reference interval
Native values:
0.35 to 4.94 mIU/L
Context:
UK NHS laboratory reference interval for adults.
Population / collection / assay:
any; adult. UK NHS laboratory reference interval for adults. Any additional details not recorded here remain unspecified.
Source date/version:
Not recorded
Last verified in this pass:
Not rechecked. Recorded access: 2026-06-11.
Verification:
verified_numeric_source. Inherited extraction, not rechecked in the September 20 pass. Endpoint inclusion, source version and any context absent from the original record remain unverified.
Endpoint inclusion is not verified. A boundary label does not imply ≤ or ≥.
Locator:
Original source link and basis note
Read Oxford University Hospitals (new tab)

Quest Diagnostics

Source reference interval

United States · Any sex · adult

Quest Diagnostics adult TSH reference (20 years and older).

0.4 to 4.5 mIU/L

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Source details: Quest Diagnostics, Source reference interval
Native values:
0.4 to 4.5 mIU/L
Context:
Quest Diagnostics adult TSH reference (20 years and older).
Population / collection / assay:
any; adult. Quest Diagnostics adult TSH reference (20 years and older). Any additional details not recorded here remain unspecified.
Source date/version:
Not recorded
Last verified in this pass:
Not rechecked. Recorded access: 2026-06-11.
Verification:
verified_numeric_source. Inherited extraction, not rechecked in the September 20 pass. Endpoint inclusion, source version and any context absent from the original record remain unverified.
Endpoint inclusion is not verified. A boundary label does not imply ≤ or ≥.
Locator:
Original source link and basis note
Read Quest Diagnostics (new tab)

Clinical categories and treatment goals

NACB narrower-normal (via review)

Source category

United States · Any sex · adult

Proposed narrower true-normal TSH upper limit, debated against the wider lab interval.

0.4 to 2.5 mIU/L

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Source details: NACB narrower-normal (via review), Source category
Native values:
0.4 to 2.5 mIU/L
Context:
Proposed narrower true-normal TSH upper limit, debated against the wider lab interval.
Population / collection / assay:
any; adult. Proposed narrower true-normal TSH upper limit, debated against the wider lab interval. Any additional details not recorded here remain unspecified.
Source date/version:
Not recorded
Last verified in this pass:
Not rechecked. Recorded access: 2026-06-11.
Verification:
verified_numeric_source. Inherited extraction, not rechecked in the September 20 pass. Endpoint inclusion, source version and any context absent from the original record remain unverified.
Endpoint inclusion is not verified. A boundary label does not imply ≤ or ≥.
Locator:
Original source link and basis note
Read NACB narrower-normal (via review) (new tab)

Named clinician and other published views

Optimal DX

Published view

United States · Any sex · adult

Functional-medicine optimal TSH band.

1 to 2 mIU/L

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Source details: Optimal DX, Published view
Native values:
1 to 2 mIU/L
Context:
Functional-medicine optimal TSH band.
Population / collection / assay:
any; adult. Functional-medicine optimal TSH band. Any additional details not recorded here remain unspecified.
Source date/version:
Not recorded
Last verified in this pass:
Not rechecked. Recorded access: 2026-06-11.
Verification:
verified_numeric_source. Inherited extraction, not rechecked in the September 20 pass. Endpoint inclusion, source version and any context absent from the original record remain unverified.
Endpoint inclusion is not verified. A boundary label does not imply ≤ or ≥.
Locator:
Original source link and basis note
Read Optimal DX (new tab)

Rupa Health

Published view

United States · Any sex · adult

Functional-medicine practitioner optimal TSH target.

0.5 to 2.5 mIU/L

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Source details: Rupa Health, Published view
Native values:
0.5 to 2.5 mIU/L
Context:
Functional-medicine practitioner optimal TSH target.
Population / collection / assay:
any; adult. Functional-medicine practitioner optimal TSH target. Any additional details not recorded here remain unspecified.
Source date/version:
Not recorded
Last verified in this pass:
Not rechecked. Recorded access: 2026-06-11.
Verification:
verified_numeric_source. Inherited extraction, not rechecked in the September 20 pass. Endpoint inclusion, source version and any context absent from the original record remain unverified.
Endpoint inclusion is not verified. A boundary label does not imply ≤ or ≥.
Locator:
Original source link and basis note
Read Rupa Health (new tab)

Units change the display, not the source population or clinical purpose. Source-native values remain in each disclosure. Source comparison in common US units

Methodology, units and limitations

AI-collected source-comparison prototype. Not medically reviewed. Not a diagnostic tool. Reference intervals describe a source population; categories and treatment goals have different purposes. Named views do not establish a universal optimum. Country identifies a source, not a biological normal for everyone there.

Source counts use stable publisher IDs; one source may supply several legitimate categories. Source dates and recorded access dates are separate. Older rows explicitly marked not rechecked have not received a new source review. Missing age, fasting, assay and risk details are not inferred.

Strict < and > differ from inclusive ≤ and ≥. Approximate and unknown boundaries are labeled, not converted into exact cutoffs. Printed endpoint precision is preserved; gaps between source categories are not silently filled.

Bars show only the visible portion of each interval. Arrows indicate continuation; small intervals are not enlarged to imply a wider range. Display rounding does not change stored values. Numerically equivalent units do not change the numbers.

Personal-result entry is not available in this release. Do not enter health results into the marker finder. The tool does not classify you, recommend treatment or adjust ranges for your age.