‘Free-From’ Foods Are Changing the Way Your Meals Are Produced

Photo: Jeffrey Greenberg/UIG via Getty Images

By Jen Skerritt, Megan Durisin, and Craig Giammona

General Mills Inc. spent five years and built a special eight-story sorting facility to get rid of an ingredient that wasn’t in its cereal.

To ensure that that some varieties of Cheerios — made from oats and thus naturally gluten-free — didn’t contain even tiny particles of the…