The article analyzes the preventive and therapeutic possibilities of using probiotic fermented dairy products (baby curds, yoghurts, biolacts) in children with various pathological conditions. It outlines their effect in preventing respiratory and intestinal infections in children of different ages. Incorporation of probiotic strains with proven efficacy (including those as probiotic fermented dairy products) into the combination treatment of pathological conditions associated with Helicobacter pylori is shown to significantly increase the efficiency of eradication therapy and to prevent the development antibiotic-associated diarrhea.