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18 Most Sickening Food Ingredients

air-tight-meat-package

Credit: Corbis

4 of 20

Carbon monoxide

What it is: We have carbon monoxide detectors in our homes for a reason: this odorless gas can be deadly. But the same stuff that comes from the exhaust pipe of your vehicle is also used in packaging ground beef and some fish like tilapia and tuna. It helps them retain their youthful blush, says Patty Lovera, assistant director of Food & Water Watch.

Where you’ll find it: Carbon monoxide is injected into plastic wrap after all the air is sucked out to block the process of oxidation that can turn pink meat brown. The process is considered safe for humans although it isn’t widely used anymore, says Lovera. Consumer groups have objected to the treatment's potential to mask meat spoilage.

Gross-out factor: Medium

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