Source: Candice Choi, WINSTON-SALEM JOURNAL. 12/10/18
 

Many companies including McDonald's and Kellogg are purging artificial colors from their foods, but don't expect your cheeseburgers or cereal to look much different. Colors send important signals about food, and companies aren't going to stop playing into those perceptions. What's accepted as normal can change, too, and vary by region. Up until the 1980s, Americans expected pistachios to be red because they were mostly imported from places where the nuts were dyed to cover imperfections.

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