Extracted data included sample size in both groups, background information of participants, duration of intervention, description of group of control and intervention group, outcome measures, results (short - or long term), significance and relevance. Data such as p-value, mean, standard deviation or standardized mean differences (SMD) and their 95% confidence interval (CI) were also extracted and analyzed using the comprehensive meta-analysis (CMA software). Data was entered into CMA software where studies reported changes from baseline to post-intervention for each group. Three studies [18-20] reported the sample size of both the control and intervention groups, and the p-value of the independent group; one study [21] reported the mean, sample size, and p-value of independent groups. The random effects model was used because four studies did not measure the same treatment effects, variations between studies need to be accounted for. The results of this meta-analysis are disappointing, with dietary interventions having had some positive effects on weight loss in both obese and obese children overall, but the effects were...