Wikipedia
Critics of the film, including McDonald's, argue that the author intentionally consumed an average of 5,000 calories per day and did not exercise, and that the results would have been the same regardless of the source of overeating.[15] One reviewer pointed out "he's telling us something everyone already knows: Fast food is bad for you."[16] Robert Davis of Paste implied the film is an example of "how the ignorance of, or willful distortion of, basic scientific methods is used to manipulate public opinion."[17]
In the comedic documentary reply Fat Head, Tom Naughton "suggests that Spurlock's calorie and fat counts don't add up" and criticizes Spurlock's refusal to publish the Super Size Me food log; About 1/3 of Spurlock's calories came from sugar. His nutritionist, Bridget Bennett RD, warned him about his excess intake of sugar from "milkshakes and cokes". It is revealed toward the end of the movie that over the course of the diet, he consumed "over 30 pounds (14 kg) of sugar, and over 12 pounds (5.4 kg). of fat from their food".[19]
After eating exclusively at McDonald's for one month, Soso Whaley said, "The first time I did the diet in April 2004, I lost 10 pounds (going from 175 to 165) and lowered my cholesterol from 237 to 197, a drop of 40 points." Of particular note was that she exercised regularly and did not insist on consuming more food than she otherwise would. Despite eating at only McDonald's every day, she maintained her caloric intake at around 2,000 per day. [20]
After John Cisna, a high school science teacher, lost 60 pounds while eating exclusively at McDonald's for 180 days, he said, "I'm not pushing McDonald's. I'm not pushing fast food. I'm pushing taking accountability and making the right choice for you individually... As a science teacher, I would never show Super Size Me because when I watched that, I never saw the educational value in that... I mean, a guy eats uncontrollable amounts of food, stops exercising, and the whole world is surprised he puts on weight? What I'm not proud about is probably 70 to 80 percent of my colleagues across the United States still show Super Size Me in their health class or their biology class.
Usually I don't agree with the "A calorie is a calorie theory", but in this case it's true. If you drink 5000 calories of milk shakes and cokes a day and don't exercise, you're going to get fat.