Industrial processing of food poses health risks beyond poor nutrition
A Tufts University study published in *American Journal of Public Health* found that ultra-processed foods may pose independent health risks beyond poor nutrition, even after accounting for nutrient quality. Researchers linked higher consumption of these foods to worse health outcomes, including higher body weight, blood sugar issues, and increased mortality risk, suggesting processing methods and additives play a role.
Researchers at Tufts University’s Food is Medicine Institute analyzed data from the National Health and Nutrition Examination Survey (NHANES) spanning 1999–2018, linking it to the National Death Index through 2018. The study examined over 10 cycles of dietary data from participants who completed 24-hour dietary recalls, categorizing foods by processing levels—from minimally processed to ultra-processed—and rating nutritional quality. For every 10% increase in calories from ultra-processed foods, participants showed worse health markers, including higher body weight, poorer blood sugar control, elevated blood pressure, and unfavorable cholesterol levels. They also faced a higher risk of diabetes, metabolic syndrome, cancer, and premature death, even after adjusting for nutrient quality, saturated fat, added sugars, and sodium. The findings suggest that industrial processing—such as structural changes, loss of beneficial compounds, additives, and packaging chemicals—may contribute to health risks beyond traditional nutritional concerns. Study author Dariush Mozaffarian noted that ultra-processed foods account for over 50% of adults’ and 60% of children’s caloric intake in the U.S., emphasizing the need for policy interventions like warning labels, additive bans, and school meal restrictions. Co-author Juna Hatta-Langedyk highlighted the urgency of addressing structural barriers to fresh food access to improve public health. The study supports ongoing policy efforts, including state-level laws targeting ultra-processed foods and potential national definitions for these products. Researchers also called for further investigation into how processing methods independently affect health, beyond nutrient composition. The study underscores the need for broader dietary policies to mitigate the growing consumption of ultra-processed foods in America.
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