Thyroid Support Silver is a natural herbal formula that can help to maintain normal levels of thyroid hormones in dogs by providing nourishing and restorative support. These highly effective, natural herbs support your canine's adrenal glands, the immune system, and can help peripheral body systems that are affected by the thyroid gland. The production of normal thyroid hormones can combat everything from low energy and weight gain to heart abnormalities and high cholesterol levels.