Hyperthyroidism Diet: Foods to Avoid and Manage Symptoms

Dietary modifications support hyperthyroidism management by limiting iodine, avoiding thyroid stimulants, and preventing medication interactions.

1. Limit Iodine-Rich Foods

Excess iodine fuels hormone overproduction.

• Seaweed, kelp, nori, dulse
• Shellfish, saltwater fish
• Iodized salt (use non-iodized)
• Dairy, eggs (moderate iodine)
• Commercial breads (iodate dough conditioners)

2. Avoid Thyroid Stimulants

• Caffeine (coffee, energy drinks, tea) — exacerbates tachycardia, anxiety
• Alcohol — worsens sleep, bone loss
• Nicotine — increases metabolic demand

3. Separate from Thyroid Medication

Take antithyroid drugs on empty stomach; wait 30–60 min before:

• Soy products (tofu, soy milk) — impair absorption
• High-fiber foods, calcium supplements, iron, multivitamins
• Antacids (aluminum/magnesium)

4. Moderate Goitrogens (Cooked)

Cruciferous vegetables (broccoli, cabbage, kale), soy, sweet potatoes, millet. Cooking inactivates goitrogens; moderate intake is safe.

5. Nutritional Support

• High-calorie, high-protein diet to counteract catabolism
• Calcium and vitamin D for bone protection
• Small, frequent meals

Consult a dietitian for personalized planning.