Hashimoto\'s Thyroiditis Lifestyle Interventions for Finding and Treating the Root Cause

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Table   6:  Goitrogen   Effects on  Thyroid

Causes Agents Action

Millet, soy Flavonoids Impairs thyroperoxidase activity -

Cassava, sweet po-

tato, sorghum

Cyanogenic

glucosides

metabolized to

thiocyanates

Inhibits iodine thyroi-

dal uptake

Babassu coconut,

mandioca Flavonoids

Inhibits thyroperoxi-

dase

Cruciferous veg-

etables: cabbage,

cauliflower, broccoli,

turnips, canola

Glucosinolates thyroidal uptakeImpairs iodine

Seaweed (kelp) Iodine excess thyroidal hormonesInhibits release of

Malnutrition Vitamin A deficiency Increases TSH stimulation

Iron deficiency Iron deficiency

Reduces heme-de-

pendent thyroperoxi-

dase thyroidal activity

Selenium deficiency Selenium deficiency

Accumulates

peroxides and

causes deiodinase

deficiency; impairs

thyroid hormone

synthesis

The goitrogens in soy are still present after cooking. Soy is also a com-
mon allergen. People with underactive thyroid function and Hashimoto’s
should avoid soy completely. On a personal note, I have suffered from a
“soy crash,” feeling drained and exhausted the day after eating soy.