Iodide is used by the thyroid gland to make iodo-hormones essential for brain and neural development in fetuses and infants. A diet deficient in iodine can result in a variety of growth and developmental problems and when severe may cause cretinism. Perchlorate, thiocyanate, and nitrate are goitrogens that competitively inhibit iodide uptake. On a molar basis, perchlorate is preferred 30:1 over iodide, 15:1 over thiocyanate, and 240:1 over nitrate [1]. On a mass basis, 1 g of perchlorate is equivalent to 38 g of iodide or 8.7 g of thiocyanate or 150 g of nitrate. A published literature review [2] revealed that dietary nitrate and thiocyanate exposure provided a much larger proportion of iodide uptake inhibition than perchlorate. Perchlorate in milk, a major food source of dietary iodide [3], generally was found at