Supports Healthy Thyroid Function. Nutrients for Healthy Metabolism. Non-GMO. A Dietary Supplement. Kosher. Halal. How it works: Ortho Thyroid™ has been carefully formulated to support thyroid and glandular activity, which are key factors to support optimal brain function and the production of energy. With 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. Ashwagandha extract has also been included to complement the nutritional component of this formula.