Unfermented Soy
Fermented soy foods differ from soy protein isolate because fermentation mostly neutralizes thyroid-inhibiting effects. Soy isoflavones can block iodine uptake as well as inhibit hormone-producing enzymes. Unfermented soy contains genistei…
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Fermented soy foods differ from soy protein isolate because fermentation mostly neutralizes thyroid-inhibiting effects. Soy isoflavones can block iodine uptake as well as inhibit hormone-producing enzymes. Unfermented soy contains genistein and daidzein, which can inhibit thyroid peroxidase. Inhibiting thyroid peroxidase can impair thyroid hormone production. Soy protein isolate is widely used in protein supplements, powders, bars, and soy milk, creating repeated exposure.