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Iodine is a microelement necessary for thyroid gland hormones production. It is essential for the growth and development of human body. The aim of the study was to determine urine iodine excretion in schoolchildren living in urban area. We found out that approximately 42% of the examined children excreted small amounts of iodine with urine, which proves low dietary intake of the element. Therefore, it is necessary to promote the right dietary patterns and iodine supplementation in developing children.

Iodine is the element necessary for the human organism to function properly. Iodine is essential especially for the synthesis of thyroid hormones that regulate the cellular metabolism of the whole organism. The purpose of the work was to estimate the concentration of iodine in urine among the inhabitants of a typical agricultural region as a simple method of detecting deficiency of iodine in the human organism. The biggest iodine excretion was observed in a group above 40 years of age. The amount of the excretion of iodine together with urine was similar among men and women up to 40 years old. Monitoring of iodine concentration in urine is a sensitive marker of iodine deficiency in the human organism.

The purpose of the work was to appraise the correlation between magnitude of iodine excretion with urine and concentration of iodine ions in drinking water in the population living in the Lublin province. The tests were also performed among the citizens of the Zamość voivodship. Mean concentration of iodine in urine of the tested citizens was 132.0 micrograms/g creatinine. Mean value of I ions in drinking water was 27.5 micrograms/l. The obtained results of concentration of iodine both in urine and drinking water did not differ as shown in references. Statistically significant correlation between the measure of I excretion in urine and I ions concentration in drinking water was confirmed. There is no ascertained deficiency of iodine in Zamość region inhabitants. The concentration of iodine in drinking water from adjacent wells was fluctuating in wide limits, but did not differ from recommended norms. There is a positive correlation between concentration of iodine in drinking water and its level in excreted urine.