NOW® Thyroid Energy is a complete nutritional supplement for the support of a healthy thyroid gland. NOW has combined Iodine and Tyrosine, the two integral constituents necessary for the synthesis of thyroid secretions. The minerals Selenium, Zinc and Copper have been added as cofactors needed for normal thyroid function. In addition, NOW® Thyroid Energy contains the Ayurvedic herbal extracts from Guggul (Commiphora mukul) and Ashwagandha (Withania somnifera) to complement its nutritional support components.* Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens. L-OptiZinc® is a registered trademark of InterHealth Corp. Caution: For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. Persons with thyroid disorders or those taking warfarin, thyroid medications, L-dopa, SNRIs, MAO inhibitors, or other mood altering medications should seek the advice of a physician before consuming this product. Keep out of reach of children. Store in a cool, dry place after opening. Please Recycle.