Ultraprocessed food has become one of the most debated terms in nutrition. Packaged snacks, sugary drinks and many convenience foods often fall into the category. But so do some products that may provide useful nutrients or make healthy eating more realistic for busy households.
A new Perspective published in Science argues that this broad label may not tell consumers enough about what actually makes a food more or less helpful for health.
The article is not a new clinical trial, systematic review or meta-analysis. It is an expert interpretation of five randomized controlled trials that examined ultraprocessed foods and health-related outcomes. The authors argue that the existing studies provide only weak evidence that ultraprocessing itself affects body weight regulation or cardiometabolic health independently of familiar nutritional factors.
The authors have received support for other research from government agencies, nonprofit organizations and food companies. No external organization was involved in writing the Science Perspective, and the authors state that they have not received personal financial awards, honoraria or consulting fees from the food industry.
The central issue is not whether dietary patterns high in nutritionally poor ultraprocessed foods deserve concern. Many do. The question is more specific: Is industrial processing itself the reason some foods are linked with overeating and poorer health outcomes, or are other characteristics doing more of the work?
The authors point to several familiar factors that frequently show up in ultraprocessed foods. Some are high in calories relative to their volume. Some are low in fiber or protein, which can affect fullness. Some contain high amounts of saturated fat or salt. Others have soft textures that make them easier to eat quickly.
Those characteristics can matter regardless of whether a food was produced in a factory or prepared at home.
A soft, calorie-dense food can be easy to overeat even if it does not meet a technical definition of ultraprocessed food. At the same time, a packaged food does not automatically become nutritionally poor simply because it has been processed.
“Collectively, available randomized controlled trials provide weak support for an ultraprocessing-specific effect of UPFs on body weight regulation and cardiometabolic function that is independent of established nutritional determinants,” the authors wrote.
That is a narrower conclusion than saying ultraprocessed foods are harmless.
Large observational studies have repeatedly found associations between diets high in ultraprocessed foods and health concerns such as obesity and cardiometabolic disease. But observational research cannot prove that processing itself caused those outcomes. People who consume more ultraprocessed foods may also have different overall eating patterns, lifestyles or access to food.
Randomized controlled trials can help researchers examine cause and effect more closely. But they are not automatically simple to interpret.
The five trials discussed in the Perspective compared diets containing more ultraprocessed foods with diets containing fewer. In some cases, the diets also differed in other meaningful ways, including calorie density, texture, fiber, protein and how quickly the foods could be eaten.
When several variables change at once, researchers cannot easily determine how much of the difference came from processing alone.
The trials conducted so far have also been relatively short. That makes them useful for examining immediate responses, such as calorie intake or short-term weight changes. It makes them less suited to answering questions about health effects that may develop over months or years.
The debate matters because ultraprocessed food is a broad category.
A candy bar, a packaged whole-grain bread and a fortified yogurt may all be classified as ultraprocessed, depending on their ingredients and how they were made. That does not mean they offer the same nutrition or have the same place in an eating pattern.
Processing can also serve practical purposes. It can improve food safety, extend shelf life, reduce waste and make food more affordable or convenient. For many people, packaged foods are not optional extras. They are part of how meals fit into work schedules, budgets and family life.
None of that means nutrition labels should be ignored or that all packaged foods are equivalent.
The Perspective suggests that consumers may benefit from looking beyond a single classification. Rather than treating every ultraprocessed food as equally concerning, it may be more useful to consider the qualities that affect how a food fits into an overall eating pattern.
Does it provide fiber or protein? Is it high in added sugar, sodium or saturated fat? Is it easy to eat quickly without feeling satisfied? Does it add something useful to a meal, or is it mostly displacing foods that offer more nutrition?
Those questions are not as simple as scanning for a single label. But they may be more helpful.
The research on ultraprocessed foods is still evolving. Existing studies support concern about eating patterns dominated by nutritionally poor, calorie-dense foods that are easy to consume quickly. They do not yet prove that processing alone is the reason those foods are associated with poorer health.
The authors have received research support for other work from public agencies, nonprofit organizations and food companies. Those companies have included Tate & Lyle, Ferrero, Ajinomoto, Unilever and the American Beverage Association. One author has also received travel reimbursements from several food and nutrition organizations and companies. Another served on an AstraZeneca advisory board in 2025. The authors said they have not received personal payments, honoraria or consulting fees from food companies.