Clinical Study attributes
With the rapid development of society and economy, children's simple obesity is the rising in the world and has become a chronic disease which is one of the biggest public health challenges in the world. It is a serious threat to the health of children and their adulthood. The overweight and obesity is induced by the genetic and environmental factors. The environmental factors are very important, while the dietary factors are the driving factors of many chronic diseases including obesity. This study focus on the dietary intervention of childhood obesity to build healthy intestinal flora. The interventing food was based on a natural health food - fruit and vegetable fermentation liquid, and combined with other probiotic dietary factors, dietary fiber and oligosaccharides. The implementation of the study will help to reveal the fuction mechanism of intestinal bacteria in the obese children and normal children, and to construct healthy micro environment of intestinal flor. According to the positive effect factors, the study will propose a healthy diet and nutrition intervention model for obese children, which is significant to social health especially to children's health. To investigate the accuracy of MRI in quantifying liver fat with magnetic resonance spectroscopy (MRS) as a reference. A secondary goal was to assess the prevalence of nonalcoholic fatty liver disease in overweight and obese Chinese children and adolescents.

