Possible causes of obesity can range anywhere from increasing food portion sizes and consumption of high fat fast foods, to increasing sedentary lifestyles. The concept of super-sizing is also an issue focused on by Critser (42). Critser states in his essay, ""the idea is simple--accessible but not convenient. The idea is to make the store accessible mainstream so as to make sure that the customers are presold and very intent before they get here"(42). Fast food is cheap, ultimately more convenient, and you have the luxury of eating outside the home. By super-sizing your meal you get more for your money, which appeals to the lower income citizens. When asked if you would like to get 25 percent more food for just 75 cents more, a citizen is more likely to say yes just because of the simple fact it is a bargain and they feel like they are getting a "deal". It is also cheaper for companies, like McDonalds, to use less expensive raw materials in order to cut the cost of production and in turn receive a greater profit. The introduction of cheap foods that are nutritionally poor but calorie rich provides a cheap source of high energy that acts as a substitute for more nutritious foods. Inactive lifestyles can also be blamed for the rise. Schools are reducing the amount of activity, in order to increase the amount of core knowledge classes they feel are more appropriate. Adults are also engaging less activity, with computers, the convenience of vehicles, and by watching more television (remote controls). .
Agreeing with Critser, obesity is directly connected to social class. Critser argues, "The need to address obesity as a class issue--one that transcends the inevitable divisiveness of race and gender" (44). Obesity itself is slowly moving into the middle and upper classes, but the condition excessively plagues the poor and the working poor. A lower social class citizen makes less money so they have less money to spend on goods.