CanPrev Thyroid-Pro Normal thyroid function is dependent on the presence of many trace elements for both the synthesis and metabolism of thyroid hormones. Thyroid-ProTM is specially formulated with a blend of essential minerals to support thyroid function and help prevent iodine deficiency. In addition to providing an adaptogenic herb for stress support, Thyroid-ProTM contains L-tyrosine and key cofactors necessary for the enzymatic production of the thyroid hormones, triiodothyronine (T3), and thyroxine (T4) Benefits: Synergistic blend of nutrients and herbs that help to support the healthy functioning of the thyroid gland Contains iodine naturally sourced from bladderwrack Contains the important cofactors, selenium, zinc, and copper