6 Foods That Negatively Affect Your Thyroid – What to Avoid or Limit November 28, 2025November 28, 2025 by Nadia Fermented soybeans (e.g., miso, tempeh, natto ) are less problematic in moderation. Limit your intake of unfermented soybeans if you have thyroid issues. ❌ 3. Gluten ←PreviousNext→