A science teacher in Iowa claims to have lost 37 pounds after eating McDonald's for 90 days.
And he didn't just eat salads.
"I had the Big Macs, I had the Quarter Pounders with cheese, I had sundaes, I had ice cream cones," John Cisna told KCCI.com.
Cisna and his students at Colo-Nesco School District decided to make their own version of the Morgan Spurlock documentary "Super Size Me." His students used the nutrition facts posted on the McDonald's website to outline breakfast, lunch and dinner for Cisna for the three-month period.
His results were drastically different from Spurlock's, who had gained weight and increased his cholesterol levels. Cisna claims his cholesterol dropped from 249 to 170.
"The point behind this documentary is that, hey, it's a choice," said Cisna. "We all have choices. It's our choices that make us fat, not McDonald's."
Cisna ate McDonald's but put himself on a 2,000-calorie-a-day allowance and followed recommended nutrition guidelines for things such as carbohydrates, fats and proteins. He also started walking 45 minutes per day.
In an interview with Matt Lauer on NBC's "Today" show Monday, Cisna said he plans to extend the McDonald's diet through March 15.
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