Experts Weigh In on the Debate Behind How Processed Foods Could Affect Health Take a stroll down the middle aisles of any American grocery store, and you’ll be surrounded by rows of brightly colored packaged macaroni and cheese, instant soups and chips in all forms and flavors — all with long ingredient lists.

Pieces of dried mango rest on the bottom of a black opaque goblet. Next to it, another glass contains apricot jam. Leticia Cardoso Madureira Tavares, a second-year Ph.D. student in biosystems engineering, brings the glasses up to her nose one at a time to take a sniff.