Our Thyroid Support Formula provides essential nutrients that are key to thyroid health. These include the amino acid tyrosine, iodine, selenium and zinc,along with nine other essential nutrients. The thyroid gland plays a major role in our metabolism, growth and development. It can however be affected by factors including long term stress, nutrient deficiencies, toxicity and certain medications. Possible symptoms of an underfunctioning thyroid may include fatigue, weight gain, sensitivity to the cold and constipation. This complex has been designed to support healthy thyroid function. Anyone wishing to support the normal functioning of the thyroid. In some instances, the thyroid may not be working at an optimal level although is not yet at a level low enough to be diagnosed. In these cases low thyroid symptoms such as fatigue, weight gain, constipation, sensitivity to cold and slow movements and thoughts may still be experienced.