In Reply.—The findings of Oberkotter and Tenore, when combined with our results, suggest that mothers' milk contributes to the milieu of their infants' thyroid function. Also, Oberkotter and Tenore have demonstrated a specific-binding protein for thyroid hormones in human breast milk, indicating a physiologic role of breast milk in transferring thyroid hormones from the mother to the infant.1 Preliminary data from our continuing clinical investigations show significantly greater spot T4 values in breast-fed infants than formula-fed infants at 2 to 3 weeks of age. I agree with Oberkotter that additional studies are warranted.
HAHN HB. Thyroid Function and Human Breast Milk-Reply. Am J Dis Child. 1983;137(11):1131. doi:10.1001/archpedi.1983.02140370087035