Ultra-processed foods (UPFs) are engineered products made from industrial ingredients unavailable in home kitchens, designed to be hyperpalatable and highly profitable. They now dominate the American diet, making up around 75 percent of the U.S. food supply and more than half of the calories consumed by adults in high-income countries . Among children and households with lower income and education levels, consumption rates are even higher. Unlike traditional food processing methods like freezing or fermentation that preserve whole ingredients, UPFs are manufactured from refined components and additives that bear little resemblance to their original sources.

What Makes Ultra-Processed Foods So Hard to Stop Eating?

A groundbreaking study published in Cell Metabolism revealed something striking about how our bodies respond to UPFs. Researchers compared two nutritionally similar diets that differed only in their degree of processing. Participants assigned to the ultra-processed diet ate approximately 500 more calories per day and gained about 2 pounds more than those on the unprocessed diet . The reason lies in how these foods are engineered. UPFs are designed to be exceptionally appealing to the human palate, and their composition can stimulate the brain's reward system while overriding satiety signals, making it difficult to stop eating once you start.

The ingredients and manufacturing processes used in UPFs create this effect intentionally. These products typically contain additives to enhance taste, texture, and appearance, along with preservatives to extend shelf life. The result is a food product that is highly convenient and appealing, but often low in nutritional quality and prone to overconsumption.

What Health Problems Are Linked to Ultra-Processed Food Consumption?

The health consequences of rising UPF consumption are significant and far-reaching. Multiple studies link greater exposure to ultra-processed foods with increased risk of cardiovascular disease, obesity, type 2 diabetes, colorectal cancer, and anxiety and depression, demonstrating adverse outcomes across nearly all organ systems . Beyond these chronic diseases, UPFs are associated with worse overall diet quality. The displacement of traditional, minimally processed foods by ultra-processed items is driving the rise of multiple diet-related chronic diseases globally.

Understanding what makes these foods problematic requires looking at their nutritional profile. UPFs are typically high in added sugars, sodium, modified starches, and saturated fat, while being low in fiber, micronutrients, and phytochemicals. This combination creates a perfect storm for poor health outcomes.

How to Reduce Ultra-Processed Foods in Your Diet

• Read ingredient labels carefully: Look for products made from whole ingredients you recognize rather than refined components, protein isolates, hydrogenated fats, or modified starches that indicate industrial processing.
• Choose minimally processed alternatives: Opt for whole-grain bread, yogurt, and baked beans, which are processed foods associated with reduced risk of chronic diseases like diabetes and obesity.
• Understand that processing itself isn't the enemy: Pasteurization improves food safety, freezing and canning reduce food waste, and fortified foods like milk with added vitamin D or cereal enriched with fiber can improve nutrition and address deficiencies.
• Limit foods high in added fats, sugar, and sodium: Many ultra-processed items fall into these categories, so reducing consumption of these specific nutrients helps lower overall UPF intake.

Experts emphasize that nuance matters when it comes to food processing.

"Consumers should limit UPFs in their diets, but also understand that there is nuance," said Dr. David Seres, director of medical nutrition and professor of medicine in the Institute of Human Nutrition at Columbia University Medical Center.

Dr. David Seres, Director of Medical Nutrition, Columbia University Medical Center

What Policies Could Help Reverse the Rise of Ultra-Processed Foods?

Public health experts have called for stronger and broader policies to address the UPF epidemic. Most global policies aimed at reversing the rise of UPFs have focused on reducing consumption of foods high in added fats, sugar, and sodium, many of which are ultra-processed items. However, experts argue this approach is insufficient .

Marion Nestle, Professor Emerita at New York University, highlights the need for legal authority to regulate television and social media advertising, retail product placements, sales and service in schools, and other promotions directed toward children. According to Nestle, UPF marketing "must be stopped." Beyond marketing restrictions, public health experts have called for clearer dietary guidance and health objectives, warning labels, and consumer education programs that help people understand the difference between minimally processed and ultra-processed foods.

The evidence is clear: ultra-processed foods are engineered to override your body's natural fullness signals, leading to overconsumption and weight gain. By understanding what makes these products problematic and making intentional choices to limit them, you can take control of your nutrition and reduce your risk of chronic disease.