John Cisna, a biology teacher from Iowa, is now a brand ambassador for the fast food chain after conducting an experiment to see how he could improve his health by eating a 2,000-calorie diet of only McDonald’s meals.
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John Cisna, a biology teacher from Iowa, is now a brand ambassador for the fast food chain after conducting an experiment to see how he could improve his health by eating a 2,000-calorie diet of only McDonald’s meals.