Soy and Your Thyroid

You will not find this in soy product promotions but soy indeed can be bad for you. For one thing, there are chemicals called isoflavones in soy that are dangerous to the hormone-sensitive parts of the thyroid gland.

The thyroid secretes thyroxine (T4) and triiodothyroxine (T3), which regulate the body's metabolic rate and these isoflavones can inhibit the thyroid's T3 and T4 poroduction resulting in goiter as well as oother thyroid problem including those caused by autoimmune reactions.