Diarrhea is among the leading causes of morbidity and mortality in children under five years of age, especially in developing countries. Due to dehydration and imbalance of water and electrolytes in the body. There is a need to introduce alternative ways for management of this common health problem. The aim of this study was to evaluate and compare the effects of regular and probiotic yogurt on duration and frequency of diarrhea in children aged one to five with acute watery diarrhea. Ninety

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... ients were randomly assigned to three groups, two intervention groups, including regular and probiotic yogurt groups, and a control group. In the regular yogurt group, the first significant decrease in frequency of diarrhea was 2.15 ± 0.61 days and in the probiotic group was 2.65 ± 0.72 days after admission to the hospital. * Duration refers to as the number of days at the three specific points of time minus one. ** Using the post-hoc test after repeated measure ANOVA, the second duration was identified. The second duration is the number of days from admission to first observed significant decrease of frequency of diarrhea minus one.