TriZeniums Thyroid Support is a unique combination of vitamins, minerals, herbs and amino acids formulated to help maintain normal thyroid activity. Included in our formula are: L-Tyrosine: Recognized as a conditionally essential amino acid, some individuals are unable to naturally produce sufficient levels of L-Tyrosine and must obtain it from outside sources. This amino acid plays a key role in the production of the thyroid hormones Thyroxine and Triiodothyronine. No cheap foreign ingredients and Made in the USA. Unique combination of vitamins, minerals, herbs and amino acids formulated to help maintain normal thyroid activity 60 capsules No cheap foreign ingredients Made in USA Size: 60 capsules Active ingredients: Vitamin B-12, Iodine, Magnesium, Zinc, Selenium, Copper, Manganese, Molybdenum, L-Tyrosine, Schizandra We cannot accept returns on this product.