High bromide intake in the lactating rat significantlyinfluences transfer of iodine and bromide via mother's milk

For the neonatal mammals, mother's milk represents the sole source of the essential trace element iodine. Very high bromide intake in the rat dams caused a marked decrease in the iodine transfer through mother's milk to the suckling. Bromide ions, ingested by the mothers, easily penetrated into mother's milk and via milk were transferred in a large extent to the young. However, in comparison with the transfer of iodine, the rate of bromide transfer was much slower.