Thyroid and Goitrogens

Lotus97

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There's some information that says that goitrogens are bad if you have hypothyroid. A list of foods with goitrogens and goitrogenic drugs can be found here: http://en.wikipedia.org/wiki/Goitrogen

My TSH, free T3 and T4 are in the normal reference range, but I was told that my free T3 (2.8) and T4 (1.20) are actually a little low. My TSH is normal even by stricter standards (under 2.0). How strict do I need to be compared to someone who has full-blown hypothyroidism? And with goitrogens in foods is it simply a matter of blocking iodine uptake (in which a person could just increase their iodine dose) or is it more complex than that?