Patient D., 38 years old, was admitted to the clinic with complaints of weakness, increased fatigue, hair loss, brittleness and exfoliation of nails, taste perversion, epigastric pain, aggravated on an empty stomach, especially in spring and autumn. Blood test: hemoglobin - 70 g / l; erythrocytes - 3.5 x 1012 / l; color indicator - 0.6 reticulocytes - 0.1%; platelets - 385 x 109 / l; white blood cells - 4.0 x109 / l neutrophils: metamyelocytes -0%; stab core -2%; segmented - 65% eosinophils -3%; basophils - 0%; lymphocytes - 26%; monocytes - 4% blood smear: microcytes, anulocytes. In the bone marrow, the number of sideroblasts is reduced.