NOW® Thyroid Energy™ is a complete nutritional supplement for the support of a healthy thyroid gland.* NOW has combined iodine and tyrosine, the two 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™ has the ayurvedic herbal extract ashwagandha to complement its nutritional support components.* Supports Healthy Thyroid FunctionSupports Healthy MetabolismA Dietary Supplement