Iodine is important for thyroid hormone production. Pregnant people need more iodine than others. Iodine is found in fish, seaweed, dairy, and iodized salt. Iodine deficiency is a nutritional ...

Ever since manufacturers began adding iodine to salt in the 1920s, deficiency in this trace element has been relatively rare. And that's a really good thing, considering that iodine is an essential ...

The 13-year-old boy came to the clinic with a rapidly ballooning neck. Doctors were puzzled.Testing ruled out their first suspicion. But further tests pinpointed what they — and the boy — had been ...