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-Pro 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, CanPrev Thyroid-Pro contains L-tyrosine and key cofactors necessary for the enzymatic production of the thyroid hormones, triiodothyronine(T3) and thyrozine(T4).