What should not be eaten with hypothyroidism

　　Hypothyroidism generally refers to hypothyroidism. Under normal circumstances, patients with hypothyroidism should avoid eating foods such as kelp, cabbage, pork belly, pork liver, and cold watermelon, as well as medications such as ferrous sulfate tablets, prednisone tablets, amiodarone tablets, amitriptyline tablets, and phenytoin sodium tablets. These foods and drugs may affect thyroid hormone synthesis or drug absorption, and the effects may vary from person to person. The specific analysis is as follows:

　　I. Food

　　1. Kelp: It has an extremely high iodine content. Patients often have impaired thyroid hormone synthesis, and excessive iodine may interfere with thyroid function. Especially for patients with autoimmune thyroiditis, it may worsen thyroid tissue damage and hinder hormone synthesis.

　　2. Cabbage: It contains thiocyanate, which can inhibit the thyroid's utilization of iodine. Long-term and excessive raw consumption may hinder thyroid hormone synthesis, worsening symptoms such as fatigue and cold intolerance. It is recommended to cook it thoroughly and consume in small amounts.

　　3. Pork belly: It has a high fat content. Patients have a slow metabolism and are prone to elevated blood lipids. Consumption may worsen lipid metabolism disorders, increase cardiovascular risk, and may also affect thyroid hormone absorption.

　　4. Pork liver: It has high cholesterol content. Patients have weak lipid regulation ability, and consumption may cause a sudden rise in cholesterol, increasing vascular burden and potentially triggering cardiovascular complications.

　　5. Cold watermelon: It is raw, cold, and cool in nature. Patients often have spleen and stomach deficiency-cold. Consumption may stimulate the gastrointestinal tract, worsen spleen and stomach damage, lead to abdominal distension and diarrhea, and intensify the body's cold deficiency state.

　　II. Medications

　　1. Ferrous sulfate tablets: They can bind with levothyroxine sodium tablets used for treatment, reducing their absorption efficiency, affecting therapeutic effects. There should be at least a 2-hour interval between the two medications.

　　2. Prednisone tablets: Long-term use may suppress thyroid axis function, reduce thyroid-stimulating hormone secretion, worsen symptoms such as fatigue and drowsiness. Dosage adjustment and thyroid function monitoring should follow medical advice.

　　3. Amiodarone tablets: They have a high iodine content, which may interfere with thyroid hormone synthesis and metabolism, possibly inducing or worsening the condition. They should be avoided; if necessary, regular thyroid function checks are required.

　　4. Amitriptyline tablets: They may affect peripheral conversion of thyroid hormones, reducing active hormones, worsening symptoms such as low mood and slow reactions. The doctor should be informed of the condition before use.

　　5. Phenytoin sodium tablets: They accelerate thyroid hormone metabolism, shorten the half-life, lower hormone levels, and affect the efficacy of levothyroxine sodium tablets. Dosage adjustments should be made based on test results.

　　Patients with hypothyroidism should maintain a low-iodine, low-fat, and mild diet in daily life, eat more eggs, lean meat, and fresh vegetables, develop regular sleeping habits, and avoid excessive fatigue. When using medications, strict adherence to medical advice is essential. Patients should inform their doctors of their condition and never take medications on their own or arbitrarily adjust dosages, to prevent interference with disease management.