13
Breast milk
Breast milk
PENDRIN
ANO1
CFTR
T4
T3
T1
Iodide transport across the apical epithelial membrane also occurs through transporters that include
ANO1 and CFTR . Limited data suggests that iodine occurs in various forms in breastmilk, mostly
iodide (~77%) and other organic materials like iodinated milk proteins (~11%). It also occurs in
thyroid hormones, predominantly T1 (~7–25%) but very little T4 or T3 (~1%; no data on T2).
e maximum methimazole/carbimazole content of breast milk is 0.1–0.2% of the maternal dose,
and for PTU this is <0.1%.
