while others use iodine from kelp or other natural sources. The dosage of iodine can also vary, with some supplements providing high doses of iodine, while others offer a more moderate amount.

in its frond-shaped leaves, making it an abundant source of vitamins and minerals like iodine, potassium, magnesium, calcium and iron. One of the benefits claimed for kelp is that its abundance of ...

Because brown seaweeds such as kelp contain high levels of iodine, the British Dietetic Association recommends eating them no more than once a week — especially during pregnancy. Since seaweed ...