60 veggie Iodine capsules. This formula contains biologically available iodine and chamomile to reduce irritation. Iodine is a trace element and is needed to make thyroid hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3). Thyroxine (T4) has four iodine molecules attached to its structure, while triiodothyronine (T3) has three iodine molecules attached to it. Iodine is found in seafood, bread, salt, and seaweed. See our website for more information regarding research on Iodine for thyroid balance, Thyroid Disease and Breast Cancer and the iodine loading test instructions.