TPO and Hashimoto thyroiditis: The results of this study indicate that, in endemic areas with mild and moderate iodine deficiency, there were correlations between the iodine concentrations in drinking water and the titers of antibodies to thyroglobulin and thyroid peroxidase (TgAbs and TPOAb) as well as the TSH levels in the serum of male and female patients with a hypothyroid form of Hashimoto’s thyroiditis, which indicated the risk of disease progression with additional iodine intake in the organism, especially among the women (Table 3).