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Each period of childhood is characterized by its own peculiarities of growth and development, the degree of morphological and functional maturity of individual organs and systems, the specifics of physiological and metabolic processes. Rational feeding and nutrition play a significant role in a child’s health. The authors presented modern approaches to the complementary food for children, its timing, taking into account the child’s readiness to receive new food, the composition of the dish, feeding technique, the formation of proper eating habits and behavior. The literature actively discusses the problem of the formation of taste preferences at early age; thisisthe period for the first acquaintance with varioustastes. The article demonstratesthe advantages of using products of industrial production. It is particularly important to overcome the negative attitude to new products – it determinesthe attention of the specialists to the problem of the introduction of complementary foods.Conflict of interest: The authors of this article confirmed the lack of conflict of interest and financial support, which should be reported.

Forthe harmonious development of the child at any age, the dietshall be balanced in terms of the proteins, fats and carbohydrates, and it shall include the sufficient amount of the macro- and microelements as well. The micronutrients are necessary for the functioning of all organs and systems, are part of many enzymes, hormones, immune factors. Numerous domestic and foreign studies indicate to the insufficient attention to this problem; that contributesto the development of deficiency conditions. The article considersthe issues associated with the introduction of products of industrial production enriched with the mineral elements in the nutrition of children.

The article presents current data on an important role of vitamin D in an organism and possible disorders leading to the provision decrease. Research objective: to determine the sufficiency of vitamin D in children staying in hospital with bronchopulmonary pathology without diagnosed rachitis, to show the role of dairy products in a diet for correction of lack of the vitamin D. A total of 120 children from the 1 month to 3 years were examined, in 20 of them 25(OH)D level in a blood serum was detected via the enzyme-liked immunoassay. The average values in infants were 13,3±0,6 ng/ml, in patients in comparative group 25,9±1,1ng/ml. Findings indicate the necessity of correction of vitamin D for children, in particular using dairy products. Enriched milk products provide children’s organism with vital nutrients as a factor supporting their health.