. Author manuscript; available in PMC: 2017 Jan 1.

Published in final edited form as: Curr Opin Oncol. 2016 Jan;28(1):18–25. doi: 10.1097/CCO.0000000000000242

Table 1.

LT4 dosing in athyreotic individuals

Reference	Estimates of LT4 dose requirement
	Empiric dosing based on age and BMI ranges
(3)	LT4 dose (mcg/kg/day)	BMI ≤23	BMI 24–28	BMI >28
	Age ≤40 yrs	1.8	1.7	1.6
	Age 41–55 years	1.7	1.6	1.5
	Age >55 yrs	1.6	1.5	1.4
	Formula-based dosing
(4)	LT4 (mcg/kg/day) = −0.018 × BMI + 2.13

With permission from (3)