Antithyroglobulin antibody should be less than 60IU/ml in normal condition, so antithyroglobulin antibody 800IU/ml is elevated. Due to the different testing methods and reagents, the reference indexes are different in each hospital and need to be analyzed specifically. Antithyroglobulin antibodies belong to thyroid autoantibodies and are used to help diagnose autoimmune thyroid diseases. Elevated thyroglobulin antibodies can be seen in Hashimoto’s thyroiditis and Graves’ disease. Antithyroglobulin antibodies are only an indicator of autoimmune thyroid disease, but they do not reflect the function of the thyroid gland and do not identify the type of thyroid disease. If you find elevated thyroglobulin antibodies, you should go to the hospital, complete the relevant examinations, and be evaluated by a professional doctor for treatment.