Super Size Me, unlike Fast Food Nation, focuses mainly the physical health problems of fast food.
The documentary, where Morgan Spurlock spends 30 days eating McDonalds and testing the side effects, shows that fast food does not only cause obesity, but also leads to other health problems. Spurlock's liver was damaged after the test, according to his doctor, and if he continued eating only McDonalds he could have died from liver failure. Because he ate only McDonalds three times a day, he consumed less than 50 percent of the vitamins his body needed. Also, eating only fast food raised his blood pressure, caused depression and decreased his sexual
ability. The difference between Fast Food Nation and Super Size Me is that the latter only demonstrated the unhealthy side of fast food, not the entire industry. Trends show that obesity in the world will increase if the fast food environment doesn't change. Unlike Super Size Me, Fast Food Nation has described the fast food industry as a whole, from its formation to the industry's effects on the world food. The physical health of the food is only a small part of the book. In other words, Super Size Me is an addition to the health information first written in Fast Food Nation. Both Super Size Me and Fast Food Nation explain that, while fast food is obviously unhealthy both physically and for society, people don't care. People are easily affected by advertising, especially the enormous amounts bought by fast food chains, and can be convinced at an early age to eat fast food. The negative aspects of fast food are ignored by the fast food industry, as shown in the book and documentary. Whichever way Super Size Me or Fast Food Nation argue that fast food is unhealthy, they both argue that something must be done about the current trends of fast food.