A fundamental cause of obesity and overweight is an energy imbalance between calories consumed on one hand and calories expanded. There are also a number of factors which have contributed towards an increase in obesity .
A global shift in diet towards increase intake of energy dense foods that are high in fat and sugars but low in vitamins, minerals and other micronutrients and also a growing trend towards a decrease in physical activity which mainly applys to sedentary forms of work, changing modes of transportation and increasing urbanisation.
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