Time trend analysis of hydroxylated PCB in the breast milk

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In this study, hydroxylated PCB was not detected in any breast milk samples. This result indicates that the concentration of hydroxylated PCB in breast milk is extremely lower than reported that of blood sample. This is a consequence of difficulty of migration from blood to breast milk for the hydroxylated PCB which is binding to the TTR protein in blood. This study revealed that there is no no risk of exposure to hydroxylated PCB for infant via breast-feeding.