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 wightii) and Ashwagandha (Withania somnifera) to complement its nutritional support components.Each capsule contains:Vitamin B6 (from Pyridoxine Hydrochloride) 1 mgFolate (as Folic Acid) 200 mcgVitamin B12 (as Methylcobalamin) 30 mcgZinc (from L-OptiZinc®: Zinc L-Methionine Complex) 12.5 mgSelenium (from L-Selenomethionine) 25 mcgCopper 500 mcgL-Tyrosine 500 mgIodine (from Potassium Iodide) 112.5 mcgGuggul (Commiphora wightii (Gum Resin) 37.5 mg   (Standardized to contain 2.5% Guggulesterones)Ashwaganda Root (Withania somnifera) 25 mg   (Standardized to min. 2.5% Withanolides)Non-Medicinal Ingredients: Veg capsule (hypromellose, water), Cellulose,  Stearic acid (vegetable source), Silica. Adult Dosage: Take 2 capsules twice daily with food. Take a few hours before or after taking other medications. Consult a health care practitioner for use beyond 8 weeks.