Iowa science teacher John Cisna lost 37 pounds -- and counting -- eating nothing but McDonalds food at every meal, and walking for exercise. We asked







Does the "McDonald's diet" really work? [R4kSglz5TMj]

Does the "McDonald's diet" really work? [R4kSglz5TMj]

| 1h 28m 28s | Video has closed captioning.

Iowa science teacher John Cisna lost 37 pounds -- and counting -- eating nothing but McDonald's food at every meal, and walking for exercise. We asked a registered dietician how Cisna made it work and whether a fast food diet is really a good idea. #keto gummies facebook #keto fiber pills

Aired: January 05, 2025

Rating: TV-14

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