6 Foods That Negatively Affect Your Thyroid – What to Avoid or Limit

How Diet Affects Thyroid Function

The thyroid relies on nutrients like iodine, selenium, and zinc to produce hormones. Some foods can interfere with hormone production or absorption when eaten excessively, especially in people with existing thyroid issues.

1. Soy and Soy-Based Foods

Examples:

• Soy milk

• Tofu

• Edamame

• Soy protein isolates

Soy contains compounds called isoflavones, which may interfere with thyroid hormone absorption, especially in people taking thyroid medication.

Tip: If you eat soy, consume it several hours after taking thyroid medication.

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