Iodine-free salt is generally available in supermarkets. If you have hyperthyroidism or Hashimoto's disease, you need a low-iodine diet, eat less kelp, seaweed and other foods, eat less seafood and iodized salt, eat less spicy food, pay attention to rest, avoid staying up late, and keep enough sleep.
Precautions:
Iodine intake has two sides. Excessive iodine supplementation can lead to hyperthyroidism or hypothyroidism. However, the probability of iodine exceeding the standard caused by eating iodized salt is very small. However, it is not excluded that some people who originally suffered from mild hyperthyroidism took iodized salt, which aggravated the symptoms of hyperthyroidism.
Among the iodized salt that people often eat, 1 g salt contains more than 20 micrograms of iodine, and the reasonable iodine intake for adults is 1.50 micrograms a day. If each person consumes more than 200 micrograms of iodine every day, it is iodine excess.
In other words, an adult can only eat 7 grams of iodized salt at most a day. Because potassium iodide is volatile, if you put salt in the oil pan immediately after cooking, you can reduce the iodine content.
In addition, putting iodized salt in the sun will also volatilize potassium iodide. But now, these practices are useless, because the chemical added to iodized salt is potassium iodate, which is particularly stable and does not volatilize even at high temperatures.
Refer to the above content: Baidu Encyclopedia-Non-iodized salt