Introduction It is universally known that the systemic deficiency of vitamin D may hamper the correct peak bone mass acquistion.
Aim The aim of the study was to determine the vitamin D supply in schoolchildren in Poland.
Patients and methods The study comprised 6 research centers from Poland. The healthy schoolchildren at the age of 9–11.99 were examined. In every child the liver metabolite of vitamin D was detected twice: after the winter and summer. The serum was analysed with the immunochemiluminescence method. The sufficient 25 OHD serum concentration was recognized at range of 20–100 ng/ml.
Results The 715 of children were examined. The greatest vitamin D shortages were observed in Szczecin and Białystok – in 95% and in 90% children. In Katowice and Lublin the lower concentration was detected in 89% and 88% of children and in Łódz´ and Poznań in 77% and 74%. The results of the 25OHD improved considerably after the summer. The greatest shortages were obtained in Poznań and Szczecin – in 52.9% and 42.1%. In Łódz´ the decreased concentration was observed in 41.5% of children. The lowest shortages were revealed in Lublin, Białystok and Katowice- in 28%, 26.3% and 26.3%.
The lower concentration of vitamin D in as many children indicates on adverse diet and climatic conditions.
The results of this study confirm the neccesity of the prophylaxis of vitamin D deficiency in schoolchildren in Poland.
The considerable improvement of the 25OHD serum concentration after the summer may provide favourable influence of the sunlight.
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