TSIs are antibodies that tell the thyroid gland to become more active and release excess amounts of thyroid hormone into the blood. High levels of TSI in the blood can indicate the presence of Graves’ disease. This autoimmune disease affects the thyroid gland and causes hyperthyroidism (an excess of thyroid hormone leading to several abnormal metabolisms in your body).
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Overview:
TSIs are antibodies that tell the thyroid gland to become more active and release excess amounts of thyroid hormone into the blood. High levels of TSI in the blood can indicate the presence of Graves’ disease. This autoimmune disease affects the thyroid gland and causes hyperthyroidism (an excess of thyroid hormone leading to several abnormal metabolisms in your body).