Table 3.1.4.2 Open in new tab Typical... | Oxford Academic

Table 3.1.4.2

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Typical reference ranges for serum thyroid hormones and TSH in humans^a

Hormone	Reference ranges
Thyroxine (T₄)	60–140 nmol/l
Free T₄	10–25 pmol/l
Triiodothyronine (T₃)	1.1–2.7 nmol/l^b
Free T₃	3–8 pmol/l^b
Reverse T₃	0.2–0.7 nmol/l
TSH	0.3–4.0 mU/l^c
TSHα-subunit	<2 μg/l

Hormone	Reference ranges
Thyroxine (T₄)	60–140 nmol/l
Free T₄	10–25 pmol/l
Triiodothyronine (T₃)	1.1–2.7 nmol/l^b
Free T₃	3–8 pmol/l^b
Reverse T₃	0.2–0.7 nmol/l
TSH	0.3–4.0 mU/l^c
TSHα-subunit	<2 μg/l

^a

These ranges should be determined for the particular methods used in each laboratory.

^b

Higher values in childhood.

^c

Reference interval controversial (see text).