Shalamay U. The ratio of indicators of iron metabolism, thyroid status, functional condition of the cardiovascular system, physical and mental development of schoolchildren

A minimal thyroid deficiency is formed in children with latent iron deficiency, which is manifested by a moderate increase of the thyroid stimulating hormone in blood serum of younger schoolchildren and is accompanied by a diffuse increase of the thyroid gland with age, especially under conditions of mild iodine deficiency. Mild iodine deficiency effects the iron homeostasis negatively (reduces tissue and transport funds). In children with latent iron deficiency the sympathetic influence is activated, the activation of the parasympathetic component of autonomous regulation of visceral functions prevails in the conditions of mild iodine deficiency, combined iron and iodine deficiency. Latent iron deficiency reduces functional reserves of the cardiovascular system, causes the disharmony of physical development (excess of body weight prevails), slows the cognitive functions that are potentiated against the background of mild iodine deficiency.