Caruso's Thyroid Manager (Aust L 224404) is a convenient one a day tablet which provides the necessary nutrients involved in normal healthy thyroid hormone production and metabolism. It also reduces common thyroid symptoms such as stress and fatigue. These key ingredients include Iodine, Selenium, Tyrosine, Zinc and Vitamin D. Iodine is a trace element and one of the most important components of thyroid hormones and is required for normal thyroid hormone production. It is also required for many other different reactions in the body. Selenium has been added because it is also essential for normal thyroid hormone production as the conversion of iodine is dependent on selenium. Next is the amino acid Tyrosine which reacts with Iodine to form thyroid hormones. Caruso's Thyroid Manager also contains Zinc and Vitamin D which may help support normal, healthy thyroid function.