Americans' bizarre relationship with the color of their food

Starting in early 19th century, it became increasingly more common for businesses to manipulate foods to give them a standardized, recognizable appearance: Bakers would whiten bread with chalk, dairy farmers would add a lead compound to milk to make it seem thicker, and, later in the century, meatpackers began to inject red dye into cuts to make them look fresher. (As unhealthy as these “ingredients” sound, the bigger risk was that they were masking mold or spoilage that could sicken or kill.) But one thing that made the revolution Hisano documents possible was the discovery, in the 1850s, of a vivid magenta dye made from the liquid left over after processing coal—a repulsive-sounding (but usually safe) additive that could be synthesized on the scale necessary for mass-produced foods.

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Nowadays, manipulating foods’ colors is the norm (and much safer), and even a consumer expectation. Grocery stores know that only pristine-looking apples sell—hence the shiny wax coating that growers apply before shipping. Never mind that more “natural” apples, the ones straight from the orchard, vary in color and often have dents and bruises.

I recently talked to Hisano about the history of how marketers control the colors of foods, how what’s considered natural (and acceptable to eat) has shifted over time, and what to make of consumers’ recent pushback against synthetic additives. The conversation that follows has been edited for length and clarity.

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