Iodine and thyroid-support supplements

Many supplements sold as thyroid support contain iodine or kelp, on the logic that the thyroid uses iodine. In Hashimoto's, more is not better. Excess iodine can trigger or worsen the autoimmune attack. Adding iodine or kelp without testing and clinician guidance can make you feel worse. If a product promises to support your thyroid and contains iodine, treat it with caution.