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Range Atlas is AI-collected and not medically reviewed. It is for informational purposes only, meant to help curious people start a conversation with a healthcare professional. The chart shows how sources disagree, not whether a value is good or bad for you. Color shows what each source's region means, not a recommendation.

mIU/L · 6 sources · 2 countries · spread n/a

Thyroid stimulating hormone (TSH) reference ranges

Order test
How to readbounded rangethis level and upthis level and belowLab referenceOptimal / target
Source
0.0 mIU/L2.55.0 mIU/L
Value
Meaning
Labs and hospital systems
0.3-4.2 mIU/L
Reference
0.3-4.9 mIU/L
Reference
0.4-4.5 mIU/L
Reference
Countries and guidance
0.4-2.5 mIU/L
Reference
Practitioner and biohacker targets
1.0-2.0 mIU/L
Optimal
0.5-2.5 mIU/L
Optimal

TSH in mIU/L (equals uIU/mL). Lab reference intervals are wide; some bodies and practitioners argue for a narrower upper limit.

Developer QA and conversion details

Unit rule: normalize to common United States display units. Mayo is the tiebreaker, then Quest, then Labcorp. Fixture: 17 markers, 101 rows, 70 source names, 11 conversion rules.

visualShape is stored geometry (band, floor, ceiling, point). regionMeaning is stored polarity (reference, optimal, concern_low, concern_high). Neither is inferred from labels at render time.

Conversion guardrails for Thyroid stimulating hormone (TSH)

No marker-specific conversion rule is needed for this selected fixture row set.