Sea Fish
Many types of sea fish, such as mackerel, kingfish, shark, swordfish, and tuna, are high in mercury. This substance is quite similar to iodine in terms of chemical properties. As a result, the thyroid tends to absorb and store mercury quickly in the diet. This results in iodine deficiency, which can eventually affect the production of thyroid hormones. For this reason, it is better to reduce your consumption of these foods. Keep in mind that all fish contain mercury, but the amounts in smaller categories are less than those in sea fish, which can live longer and accumulate more chemicals. Thus, you can go for smaller fish as alternatives. [8]
