Cytoplan Thyroid Support contains L-tyrosine, an amino acid. Amino acids are compounds used by the body for a number of functions including to make hormones and neurotransmitters (brain chemicals). - Seagreens® Ascophyllum nodosum is the organic kelp (a type of seaweed) species that we use in our product. It provides a natural source of iodine - iodine is one of the micronutrients known to be short in many people\'s diets. Iodine contributes to normal production of thyroid hormones and normal thyroid function - Seagreens® is a rich source of a range of minerals, vitamins, trace elements, amino acids, essential fats and antioxidants. Studies demonstrate Seagreens®’ nutritional value to be higher than seaweeds of the same species from the same location - Research shows that the iodine from Seagreens®is an ideal form which has a more prolonged and steady uptake than potassium iodide (the common form of iodine in table salt), with no adverse effect on the thyroid - Seagreens® carries Nutritious Food Seaweed BDA certification, which assures consumers of consistent nutritional value, levels of iodine, and is rooted in the principles of sustainable food and biodynamic production Selenium is included as this trace mineral contributes to normal thyroid function Iodine contributes to normal : - production of thyroid hormones and normal thyroid function - cognitive function - energy-yielding metabolism - functioning of the nervous system - growth of children Iodine contributes to the maintenance of normal skin Selenium contributes to: - normal thyroid function - normal spermatogenesis - the maintenance of normal hair and nails - the normal function of the immune system - the protection of cells from oxidative stress