The diagnosis of AIT, that is, Autoimmune thyroiditis, worries almost every patient. Still would! How else can you respond to the "sentence" from the endocrinologist? But in reality, AIT is only a hypothesis. Yes, a very common hypothesis in the world (i.e. assumption). Autoimmune thyroiditis is the subject of many scientific and popular articles, monographs and other publications. Hundreds of thousands! And yet, AIT is only a hypothesis about "inflammation in the thyroid gland provoked by the immune system, which for some unknown reason perceives its organ as a stranger." This hypothesis is contradicted by many facts that they try not to notice. Contradictory facts are not given explanations and they are trying to keep clear. After all, the exposure of the AIT will lead to the collapse of a huge amount of scientific work and authority of many leading endocrinologists. Therefore, knowledge about "Autoimmune thyroiditis" is carefully maintained and maintained by those who benefit fro