**These are foods that people with thyroid tumors should limit eating every day.**
Experts are unsure why some cells become cancerous in the thyroid, but factors like radiation exposure, iodine deficiency, and genetic mutations increase the risk. Other factors include goiter, thyroid inflammation, obesity, and radiation therapy, especially in childhood.

### Foods to Limit
**1. Cruciferous Vegetables**
“Bok choy, kale, cabbage” contain goitrogens, which block iodine absorption. Eating too much, especially raw, can affect thyroid function. Cooking helps break down these compounds, so moderate consumption is advised.

**2. Soy Products**
“Soybeans contain particularly high amounts of isoflavones,” which may interfere with thyroid hormone production. Those on thyroid medication should strictly limit soy intake.

**3. Processed Foods & Additives**
“Canned and processed foods” lack nutrients but are high in preservatives and unhealthy fats, which can hinder thyroid function. A fresh, balanced diet is recommended.

**4. Caffeine & Alcohol**
“Caffeine can reduce the ability to absorb thyroid tumor treatment drugs,” while alcohol damages thyroid cells and disrupts hormone production. Both should be minimized.

**5. Iodine & Hard Foods**
“Both iodine excess and deficiency can cause thyroid dysfunction.” Patients undergoing radioactive iodine treatment should avoid iodine-rich foods like seafood. After surgery, hard foods like nuts and dried meat can cause discomfort and digestion issues.

### Superfoods for Thyroid Health

**Berries, apples, Brazil nuts, avocado, eggs, yogurt, and pumpkin seeds** provide essential nutrients like antioxidants, selenium, iodine, and healthy fats, supporting thyroid function and hormone balance.