An Iowa science teacher was on Your World today to discuss how he lost 37 pounds while eating only McDonald’s for three months.

John Cisna said three of his students planned his meals, which totaled 2,000 calories per day and were a mix of traditional McDonald’s meals and the healthier options. For example, he said he would eat egg white delights for breakfast and Big Mac meals for dinner.

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Cisna told Neil Cavuto that the project isn’t about McDonald’s – it’s about showing students that they have choices in everything they do.

He said “Supersize Me” director and star Morgan Spurlock stuffed himself for a month, which is why his health suffered so much.

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“They were thrown under the bus and rolled over several times,” Cisna said of the way that McDonald’s was portrayed in the film.

Watch the video above for the full interview.