Thyroid and Soy

Although soy is not a “bad” food for everyone, there are several issues that cause problems for people who have thyroid disorders so they should not consume this food.

1)      Wheat, soy, and corn are the 3 largest genetically modified foods.  Although full scientific testing has not been thoroughly conducted, connections between GMOs and obesity, heart disease, cancer, leaky gut, and arthritis is highly suspected.  These modifications to food are not natural and research has begun to show the difficulty our body has digesting these nutritionally un-proportioned foods.

2)      Peanut and soy allergens are among the most common allergies.  Legume allergies such as these two are quite serious.  People who have gluten intolerance and are not fully healed by the removal of gluten often have antibodies against peanuts and soy.

3)      These legumes contain toxins including lectins, alpha-amylase inhibitors, and canavanine which can lead to issues with digestion (leaky gut), body growth or shrinkage issues (with organs), heart disease, tendon damage, immune issues, and reproduction interference.

4)      Soy contains phytic acid which prevents the absorption of calcium, magnesium, copper, iron, and zinc.  Unlike other legumes, the phytic acid in soy cannot be neutralized through cooking, sprouting, and soaking.

5)      Soy foods contain increased levels of aluminum leading to heavy metal toxicity and issues with the kidneys and nervous system.

6)      Soy increases the body’s need for vitamin D.

7)      MOST IMPORTANTLY- soy contains phytoestrogens which are anti-thyroid agents that are linked to hypothyroidism and thyroid cancer.

To increase thyroid health, decrease or eliminate soy consumption in your diet.


Gedgaudas, Nora CNS, CNT. “Primal Body Primal Mind: Beyond the Paleo Diet for Total Health and a Longer Life.” Healing Press Art. 2011. Vermont.

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