• Serum concentrations of thyroxine (T4), triiodothyronine (T3), T3-resin uptake, thyroid-stimulating hormone, and thyroxine-binding globulin were measured in 2- to 3-week-old babies, 22 fed human milk and 25 fed formula. Levels of T4 and T3 were significantly greater in breast-fed babies than in formula-fed babies.
(Am J Dis Child 1983;137:220-222)
Hahn HB, Spiekerman AM, Otto WR, Hossalla DE. Thyroid Function Tests in Neonates Fed Human Milk. Am J Dis Child. 1983;137(3):220-222. doi:10.1001/archpedi.1983.02140290012003