Obesity and overweight as a main risk factor for cardiovascular diseases, some cancers and Diabetes has been focused during recent decades. Industrialization and urbanization changed the life style of people; their physical activity decreased following technology improvement and their dietary habits changed toward high calorie and low volume foods. 

 

Developed countries mainly are in the final level of the risk factor transition. They successfully controlled underweight and under nutrition in children and now their main problem is overweight and obesity following over nutrition and physical inactivity. Developing countries based on their health system function are in different levels of transition. 

 

Most of them have under nutrition yet as a consequence of inequality in revenue distribution, low education and sometimes cultural issues. On the other hand they faced with over nutrition at the same time but in different levels and the burden of obesity and overweight are now shifting towards the poor.