This is the comprehensive panel for diagnosing autoimmune thyroid disease. It combines the two most important antibody tests—Anti-TPO and Anti-Thyroglobulin—into one simple blood draw. This panel is the gold standard for definitively diagnosing Hashimoto's disease (the most common cause of an underactive thyroid). Don't just get one piece of the puzzle. This all-in-one panel provides the complete, conclusive answer you need to understand the root cause of your thyroid symptoms.