Supports Healthy Thyroid Function Nutrients for Healthy Metabolism Non-GMO A Dietary SupplementHow it works: Ortho Thyroid has been carefully formulated to naturally support thyroid and glandular activity, which are key factors to support optimal brain function and the production of energy. With L-Tyrosine and Iodine, the two constituent nutrients of thyroid secretions, combined with specific B vitamins, zinc, selenium, and other trace minerals, this formula represents a comprehensive nutritional supplement for the support of healthy thyroid function. Guggul and Ashwagandha extracts have also been included to complement the nutritional component of this formula.