Insufficient or excessive iodine intake will have certain adverse effects on the thyroid gland. Insufficient iodine intake may cause goiter, etc., while excessive iodine intake may cause iodine hyperthyroidism. 1. Insufficient iodine intake: iodine is the raw material for the thyroid gland to synthesize hormones, if the iodine intake is insufficient, the thyroid gland will be compensated for the enlargement, due to the increased secretion of thyroid stimulating hormone to make the thyroid gland work better, it is recommended that you can add iodine to the salt, to avoid iodine deficiency. 2. Excessive iodine intake: If the iodine intake is excessive, on the one hand, it will cause iodine hyperthyroidism, on the other hand, it will also make the thyroid gland autoimmune inflammation increased significantly. Hyperthyroidism patients in the use of anti-thyroid drugs during the treatment, must ban iodine diet, because too much iodine intake, will aggravate the condition of hyperthyroidism. It is recommended to pay attention to the intake of iodized salt in food, appropriate consumption of iodized salt, iodine in the high temperature of more than 100 ℃ may be volatile, assuming that the food contains more iodine, you can make the salt containing iodine in the cooking process of food in the high temperature of 100 ℃ heating before consumption, this method can reduce the intake of iodine.