Introduction: Nowadays, obesity has became a major public health problem that is threatening this century. The incidence of obesity is increasing in population of all ages. It is a serious disease which is seen with disease charactized by chronic comorboid and takes effect on not only adults but also children and adolescents. This is a global problem also has affects especially at urban areas of the lowand middle-income countries. Those who used to be overweight or obese in their childhood are likely to become obese indivisuals into adulthood. Obesity is the most common pathophysiological cause of insulin resistance. Insulin resistance in children is significantly related obesity and cardiometabolic risk. Living in a urbanization growth world and less physical activity choices cause less movement particularly for children and adolescents and eventually obesity rate increases. Development of practise and principles of weight management nutrition theraphy for children and adolescents are updating every day. Treatment of obesity and weight management is one of the important issues of this century. Therefore it is needed more comprehensive publications including variety of age groups