9 Foods to Avoid with an Underactive Thyroid (Hypothyroidism)

Introduction
When you have an underactive thyroid (hypothyroidism), certain foods can interfere with thyroid hormone production or absorption and worsen symptoms. Avoiding or limiting these foods helps support your thyroid health and overall well-being.

1. Soy Products
Includes tofu, soy milk, edamame, soy protein.

Soy contains compounds called isoflavones that can interfere with thyroid hormone synthesis.

2. Cruciferous Vegetables (Raw)