There are three types of goitrogens: goitrins, thiocyanates, and flavonoids. Goitrogens compete with iodine for thyroid absorption, which can interfere with normal thyroid function. The key ...

But while all these salts contain sodium, only one—table salt—has been fortified with iodine, an essential nutrient. The practice of iodizing salt began in the 1920s as a way to address ...