Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body uses energy. These hormones affect nearly every organ in your body and control many of your body's most important functions. For example, they affect your breathing, heart rate, weight, digestion, and moods.
Source: MedlinePlus, U.S. National Library of Medicine
Normal range
- Normal
- 12–30 ug/mL (varies by lab) ABIM 12–27 · ARUP 13–30 ug/mL
These labs do not agree: the published adult ranges differ by up to 11%, so the same result can read as normal at one lab and be flagged at another — ABIM 12–27 · ARUP 13–30 ug/mL. Both are real published values, shown as each lab states them.
Ranges from ARUP Laboratories Test Directory, American Board of Internal Medicine (Laboratory Test Reference Ranges).
All 2 source ranges
Details
- Sample
- Serum or plasma · LOINC
- Code
- LOINC 3021-3 · ug/mL
- Also known as
- Levo-thyroxine, T4, thyroid hormone, TBG, Globul