Long-term consumption of non-iodized salt may affect the nervous system, short-term consumption has no effect. Consumption of non-iodized salt may affect the endocrine and nervous system. The development of the human nervous system is affected by thyroid hormones, and long-term consumption of non-iodized salt may lead to a decrease in thyroid hormones, affecting the development of the central nervous system, and in severe cases, mental retardation and other phenomena may occur. At the same time, the reduction of thyroid hormone causes hypothyroidism and symptoms of goiter. An enlarged thyroid gland can easily compress the nerves in the neck, the trachea, and the esophagus, resulting in corresponding symptoms. Non-iodized salt is table salt that does not contain iodide, and is suitable for patients who do not have iodine deficiency, goiter, hyperiodinemic hyperthyroidism and other diseases. So eating non-iodized salt may affect the nervous system. For normal people, consuming a certain amount of iodine is good for health.