Iodine Synergy contains potassium iodide in a 10 mg therapeutic dose for supporting thyroid function, including healthy production of thyroid hormones, and the health of breast and prostate tissue. Typical supplementation range is 10-50 mg until normal iodine ranges are seen in testing. Potassium iodide is a weak salt and easily splits apart in the gut leaving free iodide ions to join together forming I2 Iodine, which is also needed by the breast and prostate for optimal health. The selenium in this product works synergistically with iodine to aid in conversion of T4 into T3, supply antioxidant protection of the thyroid gland, and research shows it is helpful for individuals with thyroid antibodies.