The Bun from What’s Really in Your Fast Food? (Slideshow)

What’s Really in Your Fast Food? (Slideshow)

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The Bun

We’ll start with the bun, the most seemingly innocuous item on a fast-food menu. Just bread, right? Well, not really: While a Big Mac’s bun’s main ingredients are enriched flour, water, high-fructose corn syrup and/or sugar, yeast, and oil, chemical additives include ammonium sulfate, which is most commonly found in fertilizer, and azodicarbonamide, a foamed plastic stabilizer that has been banned in Europe for potentially causing asthma (and in Singapore, using it in food will earn you a $450,000 fine and 15 years in jail!).