In a twist on the Super Size Me documentary, an Iowa-based science teacher embarked on an controlled experiment of his own: to eat a diet of McDonald's—and nothing but McDonald's—for three months straight. The results were surprising and far more worthy of exploration than that of the woman who subsisted on Starbucks food alone.
According to an article in Buzzfeed, with the help of his students, John Cisna consumed 2,000 calories a day, relying on the fast-food joint's online nutritional information.
For 90 days he followed the plan, which included 45 minutes of walking per day.
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