While iodine deficiency isn’t very common today, certain people—including older adults—may be at risk. A 2017 study of 189 women ages 51 to 86 found that 60 percent were moderately deficient.

"One toxin called perchlorate can "interfere with thyroid hormone production by blocking iodine uptake," explains Fred Pescatore, MD, author of The Hamptons Diet. Women are as much as 12 times ...

Iodine deficiency among pregnant women is particularly concerning, because of how important the mineral is during fetal development. But some expecting mothers in Canada aren't getting enough of ...