In a number of developing countries, obesity currently affects all income groups of adult men and women, but it is rapidly increasing among poor urban populations. The increase in obesity in these countries is attributed to the conjunction of complex societal factors, such as urbanization, economic growth and modernization, globalisation of food markets, and changes in diet and physical activity patterns. In many cities of the developing world, diet has become higher in fats, refined sugars and processed foods, and the consumption of relatively cheaper but higher-calorie, lower-nutrient foods has been progressively adopted by poor populations. These changes in diet.