The two main antibodies to screen for Hashimoto’s are thyroid peroxidase (TPO) antibodies and thyroglobulin (Tg) antibodies. It’s important to check both because either one can be elevated, although TPO is more commonly elevated. An important thing to understand about thyroid antibodies, which are used to screen for autoimmune Hashimoto’s hypothyroidism, is that the antibody itself isn't directly related to the severity of the disease. The T cell immune response, which attacks tissue tagged by antibodies, also plays a role. To learn more, visit the site or the online Hashimoto's: Solving the Puzzle course page. Support this show http://supporter.acast.com/solving-the-puzzle-with-dr-datis-kharrazian. See acast.com/privacy for privacy and opt-out information.