The Effect of the Bariatric Surgery Type on the Levothyroxine Dose of Morbidly Obese Hypothyroid Patients

Background Doubts exist about the effect of different bariatric surgery (BS) types on levothyroxine (Lt4) absorption. We compared Lt4 doses and their variation (ΔLt4) in patients with hypothyroidism that underwent malabsorptive (MS) or restrictive (RS) surgery and studied predictors of Lt4 dose change.